SC Practice question #4

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by hariharakarthi » Mon May 24, 2010 7:46 am
Can anyone Explain what is wrong with D?
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by pradeepkaushal9518 » Mon May 24, 2010 8:06 am
i have simply choosen A and found the Oa is A.

it refers to the rough surface so we dont need to use surface again

option A is simple and concise