Al-Biruni's famous work is
Kitab-ul-hind
, which is a comprehensive study of the Indian subcontinent, its culture, religion, philosophy, and science. It is a critical text in understanding the history of India from a foreign perspective.
Step 1: Analyze the options.
- (A) Mahabharata: This is an ancient Indian epic, but it is not the work of Al-Biruni.
- (B) Ain-i-Akbari: This work is attributed to Abu’l-Fazl, not Al-Biruni.
- (C) Rihla: This is the travelogue by Ibn Battuta, not Al-Biruni.
- (D) Kitab-ul-hind: This is the correct answer as it is Al-Biruni's creation, focusing on India’s culture and traditions.
Step 2: Conclusion.
The correct answer is (D) Kitab-ul-hind, as it is the renowned work of Al-Biruni about India.
Final Answer:
\[
\boxed{(D) \, \text{Kitab-ul-hind}}
\]