Answer : 4. " 52 "
Explanation :

1. Located in the small town of Pushkar in the Ajmer district of Rajasthan, Pushkar Lake is one of the most prominent places of pilgrimage and also the site of the world-famous Pushkar Fair.

2. The lake of Pushkar has incredible historical and religious significance.

3. This lake is surrounded by about 500 temples and 52 ghats of various religious importance. People from all over the country and from all walks of life come here to take a dip in its sacred waters.

4. Out of these 52 ghats, two ghats have special significance. Gau Ghat – where the ashes of great personalities like Mahatma Gandhi, Jawaharlal Nehru and Lal Bahadur Shastri were immersed.