The famous Rewalsar lake is situated in district

Kullu
Mandi
Hamirpur
Chamba

The correct answer is: D. Chamba

Rewalsar Lake is a sacred lake located in the Rewalsar town of Chamba district in the Indian state of Himachal Pradesh. It is a popular tourist destination and is known for its scenic beauty and religious significance. The lake is said to be the birthplace of Guru Padmasambhava, the founder of Tibetan Buddhism. It is also a popular spot for bird watching.

The other options are incorrect because:

  • Kullu is a district in the Indian state of Himachal Pradesh. It is located in the northern part of the state and is known for its beautiful valleys, mountains, and temples.
  • Mandi is a district in the Indian state of Himachal Pradesh. It is located in the central part of the state and is known for its temples, palaces, and forts.
  • Hamirpur is a district in the Indian state of Himachal Pradesh. It is located in the southern part of the state and is known for its temples, monasteries, and natural beauty.