Which of the following organisations prepares topographical maps of India?

Answer: Option B

The Survey of India is the organization responsible for preparing topographical maps of India. Topographical maps represent the physical features of a region, including its terrain, elevation, and natural and man-made structures. The Survey of India is the national mapping and surveying organization of the country and plays a crucial role in providing accurate and detailed geographical information. The other organizations mentioned do not specialize in this specific function.