In which of the following places do the two rivers named Bhagirathi and Alaknanda merge and take the name Ganga?

Devprayag

The correct answer is Option (2) → Devprayag

At Devprayag, located in the Tehri Garhwal district of Uttarakhand, the two major headstreams—the Bhagirathi and the Alaknanda—merge. It is from this point forward that the river is officially known as the Ganga (Ganges).