The correct answer is B. 135 liters.
The average rate of water consumption per head per day as per Indian Standard is 135 liters. This includes all uses of water, such as drinking, cooking, bathing, washing, and flushing toilets. The standard was set by the Bureau of Indian Standards (BIS) in 2003.
The BIS standard is based on the assumption that an average person needs 135 liters of water per day for drinking, cooking, bathing, washing, and flushing toilets. However, the actual amount of water used per person can vary depending on a number of factors, such as climate, lifestyle, and economic status.
In hot climates, people need to drink more water to stay hydrated. People who live in rural areas may also use more water for irrigation and other agricultural purposes. And people who are wealthier may use more water for bathing, washing, and other household activities.
The BIS standard is a useful guideline for planning and managing water resources. However, it is important to remember that the actual amount of water used per person can vary depending on a number of factors.