Explanation:

Only statements 2&3 are correct.
Western Ghats

• The mountains of the Western Ghats are Block Mountains formed due to the down warping of a part of the land into the Arabian Sea.

• It is recognised as a UNESCO World Heritage Site and one of the eight hotspots of biological diversity in the world.

• The Nilgiri ranges connect the Western Ghats to the Eastern Ghats. 

• Famous hill station: This range is home to many hill stations like Matheran, Lonavala-Khandala, Mahabaleshwar, Panchgani, Amboli Ghat, Kudremukh and Kodagu.

Hence option 2nd is correct.