Correct Answer: a, b, c are in G.P.
Explanation:
∵ loga, logb, logc are in A.P. Then, ⇒ logb - loga = logc - logb ⇒ log b/a = log c/b ⇒ b/a = c/b ⇒ b2 = ac ∴ a, b, c are in G.P.
