Option 1 states that the river Ganga has two major sources - Bhagirathi and Alaka-nanada. Bhagirathi is indeed one of the major sources of the river Ganga. It is a glacier-fed stream that originates from the Gangotri Glacier in Uttarakhand, India. It is considered the main stream of the Ganga. However, there is no such source called Alaka-nanada.

Option 2 suggests that Bhagirathi and Yamuna are the two major sources of the river Ganga. This statement is incorrect as Yamuna is not a source of the Ganga, but rather a tributary that joins the Ganga downstream.

Option 3 suggests that Bhagirathi and Saraswati are the two major sources of the river Ganga. This statement is incorrect as Saraswati is an ancient river that is believed to have dried up thousands of years ago.

Option 4 suggests that Alakananda and Gandak are the two major sources of the river Ganga. This statement is incorrect as Alakananda is a tributary of the Ganga and not a source. Gandak is also a separate river that is not directly connected to the Ganga.

In conclusion, option 1