To answer this question, we need to understand the context of the bow Gandiva and its presentation to Arjuna.
In Hindu mythology and the epic Mahabharata, the bow Gandiva is a divine weapon that was given to Arjuna by the god Varuna.
Option A) Vayu - This option is incorrect because Vayu, the god of wind, did not present the bow Gandiva to Arjuna.
Option B) Agni - This option is incorrect because Agni, the god of fire, did not present the bow Gandiva to Arjuna.
Option C) Indra - This option is incorrect because Indra, the king of gods, did not present the bow Gandiva to Arjuna.
Option D) Varuna - This option is correct. In the Mahabharata, the god Varuna presented the bow Gandiva to Arjuna. Varuna is the god of the oceans and the celestial guardian of the west.
Therefore, the correct answer is option D) Varuna. This option is correct because Varuna presented the bow Gandiva to Arjuna.