saswata4s wrote:
Why B is wrong?

In some species of Cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer

A. for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve
B. for attracting females rises and falls in accordance with the surrounding temperature, which can in fact serve
C. in attracting females rise and fall in accordance with the surrounding temperature, in fact possibly serving
D. to attract females rises and falls in accordance with the surrounding temperature, and it can in fact serve
E. to attract females rises and falls in accordance with the surrounding temperature, in fact possibly serving
OA D

Marconi's conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is precisely the opposite, a tool for communication with a large, public audience.

(A) Marconi's conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is
(B) Marconi conceived of the radio as a substitute for the telephone, a tool for private conversation, but which is
(C) Marconi conceived of the radio as a tool for private conversation that could substitute for the telephone; instead, it has become
(D) Marconi conceived of the radio to be a tool for private conversation, a substitute for the telephone, which has become
(E) Marconi conceived of the radio to be a substitute for the telephone, a tool for private conversation, other than what it is,
OA C