Answer: A) DRAM Explanation: Memory refresh is the process of periodically reading information from an area of computer memory and immediately rewriting the read information to the same area without modification, for the purpose of preserving the information. Memory refresh is a background maintenance process required during the operation of semiconductor dynamic random-access memory (DRAM), the most widely used type of computer memory.

Cholistan, also known as the Rohi Desert, is a desert region located in the southern part of Punjab province in Pakistan, adjacent to the eastern edge of the Thar Desert. It is known for its unique landscape, sand dunes, and traditional culture of the Cholistan people.

Asia's largest sugar mill is located in Khatouli, Muzaffarnagar district of Uttar Pradesh. The Triveni Sugar Mill in Khatouli is the largest in Asia in terms of production and storage capacity. The mill has been operational since 1933.