Correct answer: A. It is a major inscriptional source for Kharavela's rule
Explanation: The direct answer is A: it is a major inscriptional source for Kharavela's rule. The Hathigumpha inscription is associated with the ruler Kharavela of ancient Kalinga, generally linked with present-day Odisha. It is carved in a cave near Udayagiri and records information about his reign, activities, public works, campaigns, and achievements. Step by step: identify the monument as an inscription; identify the ruler connected with it as Kharavela; use it as historical evidence about his rule. Option A is correct because it gives the proper ruler-source relationship. Option B is wrong: the Taj Mahal belongs to Mughal emperor Shah Jahan and is a much later monument, not a record of Kharavela. Option C is wrong: the inscription is not a list of the Chola navy; the Cholas belong to a different region and period. Option D is wrong: Akbar's revenue administration belongs to the Mughal period and is unrelated to this inscription. Memory cue: Hathigumpha—Kharavela—Kalinga; keep this three-part link together.