Consider the following pairs of Wetland/ Lake and Locations:

1. Hokera Wetland - Punjab
2. Renuka Wetland - Himachal Pradesh
3. Rudrasagar Lake - Tripura
4. Sasthamkotta - Tamil Nadu

How many pairs given above are correctly matched?

Answer: (2) Only two pairs

Explanation:

Only Pair 2 (Renuka Wetland - Himachal Pradesh) and Pair 3 (Rudrasagar Lake - Tripura) are correctly matched. 

• Hokera Wetland is located in the Union Territory of Jammu and Kashmir, not Punjab. It is a natural perennial wetland in the Kashmir region and is also known as the Queen Wetland of Kashmir. It is a designated Ramsar Site and a natural perennial wetland connected with the Jhelum basin. It receives water from the Doodhganga River, a tributary of the Jhelum.
• Sasthamkotta Lake is located in Kerala, not Tamil Nadu. It is the largest freshwater lake in Kerala and an important source of drinking water in Kollam district. Renuka Wetland is a natural freshwater wetland in Himachal Pradesh. 
• Rudrasagar Lake is Tripura's only Ramsar Site. It is an important wetland ecosystem fed by three perennial streams that drain into the Gomti River. It is the state's only Ramsar Site and functions as a lowland sedimentation reservoir.
• Renuka Wetland is located in Himachal Pradesh. It is a natural freshwater wetland fed by a small stream flowing from the lower Himalayas into the Giri River. It also contains inland subterranean karst formations.

The Ramsar Convention was signed on 2 February 1971 in Ramsar, Iran. It is an international treaty for the conservation and wise use of wetlands. Wetlands recognised under this convention are designated as Ramsar Sites because of their ecological importance.