To refute something means to prove that something is not true, wrong, incorrect. So the answer would be none of those... I would choose B, it's close in meaning.
But id the questions ask what is the antonym, then the answer would be A.<span /><span />
Explanation:
OTA: Over- the- Air
IMA: indian military academy
NDA: National democratic alliance
NCC: National cadet corps
BSF: Border security force
CRPF: Central reserve police force
hope it helps☺☺
What are we answering here there is no question or thing to do?