Consider the following statements regarding the passes in the Western Ghats:

1.The Palghat Gap is the widest pass in the Western Ghats, connecting Tamil Nadu with Kerala and facilitating the movement of monsoon winds.

2. Thal Ghat and Bhor Ghat were historically significant trade routes and are now used for major railway and road transportation between Maharashtra and the Deccan Plateau.

3. The Amboli Ghat, located in Karnataka, is one of the highest passes in the Western Ghats and serves as an important link between the Konkan coast and the Deccan Plateau.

4. Shencottah Pass (Sengottai Pass) connects Karnataka with Kerala and is crucial for both road and rail transport.

How many of the above statements are correct?