The compound (A) is:

a)

Aq.

b)

c)

/

d)

(c)

In (a), aqueous  (cold) will hydroxylate the ( ) bond

In (b),  (iodoform reaction) will not react since there is no ( ) or or ( ) group

In (c), Tollens reagent will convert the  group to ( ) group without affecting ( ) bond

In (d),  will not react, since it does not contain allylic or benzylic alcoholic group. So the answer is (c)