Have you typed the question correctly.. I feel something is wrong in every option..

In D, I don't like "practically" at the end of the sentence.. "practically" looks like an adverb and hence I feel it should be closer to the verb "are". "these" also looks incorrect if it refers to "the square root of a negative number", since it is a singular noun.

Best option would have been B, if it were using "practical" not "practically."

A is incorrectly using LIKE to provide examples. Option E is wordy("for equations for equations" - this looks like a typo) and awkward. C changes the meaning. C means that equation involving imaginary numbers are not practical.

Even in the non-underlined part of the sentence, I feel, we should use "necessarily" not "necessary".

Correct me if I am wrong..

All options seem to be poor than A
so i would stand with A

pradeepkaushal9518 wrote:although the sqrare root of a negative number has no real value,it is not necessary true that equation involving imaginary numbers like these are practically inapplicable.

A.equation involving imaginary numbers like these are practically inapplicable.
b.equation involving such imaginary numbers have no practical application.
c.equation involving these inapplicable imaginary numbers are practical.
d.equation involving imaginary numbers such as these are inapplicable practically.
E. there is no practical application for equations for equations involving such imaginary numbers as these.

plz explain

'demonstrative pronouns such as 'this/that/these' must be followed by 'noun' => A/D/E wrong

C changes the meaning. B remains.

Have one query...in B/C/D....subject is 'equation'...does it not require singular 'is/has' in place of 'have/are'

YES GREAT CRICKETER JADEGA I HAVE EDITED OPTION B

B is best among the given answers.

"have" is correct. In the first part, the subject is about the number ( .i.e square root of a number has no real value) ..

As "although" is mentioned, the subject here will be imaginary numbers.

Please correct me if I am wrong.

Thanks,
Viju

E is best of all. All other options have subject-verb disagreement.

pnk wrote:
'demonstrative pronouns such as 'this/that/these' must be followed by 'noun' => A/D/E wrong

Are you sure about this rule?

If so, is this sentence wrong?

These are the five books that influenced John.

apex231 wrote:E is best of all. All other options have subject-verb disagreement.

agree.

Check whether the questions is posted properly.
Otherwise, straightforward it is E.

i would go with B

although the sqrare root of a negative number has no real value,it is not necessary true that equation involving imaginary numbers like these are practically inapplicable.

A.equation involving imaginary numbers like these are practically inapplicable. like is not proper here
b.equation involving such imaginary numbers have no practical application.
c.equation involving these inapplicable imaginary numbers are practical. i would use inapplicable in the end.
d.equation involving imaginary numbers such as these are inapplicable practically. should be practically inapplicable
E. there is no practical application for equations for equations involving such imaginary numbers as these.

pradeepkaushal9518 wrote:although the sqrare root of a negative number has no real value,it is not necessary true that equation involving imaginary numbers like these are practically inapplicable.

A.equation involving imaginary numbers like these are practically inapplicable.
b.equation involving such imaginary numbers have no practical application.
c.equation involving these inapplicable imaginary numbers are practical.
d.equation involving imaginary numbers such as these are inapplicable practically.
E. there is no practical application for equations for equations involving such imaginary numbers as these.

plz explain

Hi Pradeep,

A though D all have 'equation', which disagree with 'are' or 'have'; E. repeats 'for equations' twice. It seems like you've made a mistake copying this problem. I'll be happy to comment once the correct version is posted!