Which of the following sentences is correct ?

A He is very good with mathematics.

B He is very good for mathematics.

C He is very good at mathematics.

D He is very good in mathematics.

Correct Answer: Option C

good at= দক্ষ
♣কোন কিছুতে দক্ষ বোঝালে good এর পর "at" preposition বসে।