More than a thousand years ago, Al-Biruni, a traveller from Uzbekistan, had described his observations about India. Which of the following observations were recorded in Al-Biruni’s book?

A. People of India are very skilled at making ponds.

B. Horses are used to draw carts in India.

C. Step-wells have separate steps for going up and coming down.

D. Lakes and Johads are built to collect water.

Choose the correct option.

The correct answer is A and C.

Al-Biruni was a famous traveler and scholar from Uzbekistan who visited India in the 11th century. In his writings, particularly in his famous book Kitab-ul-Hind, he recorded detailed observations about the lifestyle, culture, and technology of the people of India during that era.

Among his observations, Al-Biruni was highly impressed by the water conservation methods and hydraulic engineering skills of the Indian people. Specifically, he noted the following:
1. Skilled Pond Making (Observation A): He recorded that the people of India were extremely skilled at constructing ponds (talabs). He described how they piled up huge blocks of stone and joined them with iron clamps to build strong embankments (chabutaras) all around the lakes.
2. Step-wells / Bawdis (Observation C): He observed the construction of step-wells and noted that they had separate flights of long staircases, going down and coming up, to prevent overcrowding and manage traffic smoothly. This architectural feature fascinated him and was explicitly detailed in his accounts.

Observations B (about horses drawing carts) and D (specifically naming lakes and Johads to collect water in this context) were not the primary historical observations recorded by Al-Biruni in the context of his classic descriptions of Indian ponds and step-wells. Therefore, statements A and C are the correct observations recorded in his book.