Answer : 3. "Agin's"
Explanation :

Indra was a major deity in the Vedic era of Hinduism. In the Vedic period, Indra is described as superior to any other god in Rigveda 6.30.4. Sayana, in his commentary on Rigveda 6.47.18, has described Indra as taking many forms, making Agni, Vishnu and Rudra his illusory forms.