Explanation:

- The Berach River originates from the hills in the Udaipur district of Rajasthan. This river is a significant southern-side tributary of the Banas River.

- Option 1: Bharatpur - This is incorrect. Bharatpur is known for the Keoladeo National Park but is not the origin of the Berach River.

- Option 2: Jaisalmer - This is incorrect. Jaisalmer is a desert region known for its forts and is not a source of significant rivers.

- Option 3: Udaipur - This is the correct option. Udaipur is a hilly region in southern Rajasthan and the origin point of the Berach River.

- Option 4: Bikaner - This is incorrect. Bikaner is primarily a desert area and not known for river origins.

Correct Answer: Option 3: Udaipur