Question

Direction: In the questions given below, choose the most appropriate option to replace the underlined part keeping in mind grammatical correctness.
The flippers or tail of a whale or seal lack insulating blubber, but countercurrent heat exchangers {greatly reduce heat loss in these extremities, as it does in the legs of many birds.

• A. greatly reduce heat loss in these extremities, as it does in the legs of many birds.
• B. greatly reduce heat loss in the extremities, as it does in the legs of many bird.
• C. greatly reduce heat loss in these extremities, as they do in the legs of many birds.
• D. greatly reduce heat lose in these extremities, as these do in the legs of many birds.

Hint:

Plural subject → plural pronoun
heat exchangers → they do (not it does)

Answer 1

The Correct Option is C