Explanation:

- Maru Varman: There isn't much historical evidence suggesting that Maru Varman was directly responsible for transferring the capital. Instead, he is known to have founded the ruling dynasty of Chamba.

- Aditya Varman: Little information is available about Aditya Varman's contributions towards the capital's location. This makes him an unlikely option.

- Sahil Varman: Sahil Varman is indeed credited with moving the capital from Bharmaur to Chamba. He is also known for enhancing the region's prosperity.

- Soma Varman: Soma Varman's notable contributions aren't linked to relocating the capital, making him an improbable candidate.