Answer : 4. "केदारखंड"
Explanation :

The present Garhwal, spread across five sections of the Himalayas from Haridwar to Mount Kailash, was known by the name Kedarkhand in ancient times. The detail of Kedarkhand is given in Chapter 40 of Skanda Purana (Kedarkhand). In the Puranas, Kedarkhand is considered as heaven.