Solution:(c) Bidding farewell to me, my juniors said to me, "Wish you a bright and successful career ahead." (Correct)(a) Bidding farewell to me, my juniors inquired. "Wish you a bright and successful career ahead." (Incorrect reporting verb)
(b) Bidding farewell to me, my juniors said to themselves, "Wish you a bright and successful career ahead." (Incorrect reporting verb)
(d) Bidding farewell to me, my juniors wish me. "Wish you a bright and successful career ahead." (Incorrect reporting verb)