In the following question, an idiom is given. It is then followed by three sentences which may or may not accurately represent the meaning of the idiom. Choose the best set of alternatives from the five options given below of the sentences which embody the meaning of the given idiom perfectly.

As fit as a fiddle

A. Sunita who is now studying in Harvard university is a studious girl and is always first in her class.

B. Randhir has revovered from illness and now he is strong and healthy.

C. My friend is equally intelligent and hard working as your sister.