Most of the hymns (suktas) of the Rigveda are devoted to which god?

Indra is the most important god of the Rigveda, and about 250 hymns, roughly a quarter of all the hymns, are devoted to him.

About Indra in the Rigveda:

• He is the god of war, thunder and rain, and the king of the gods.
• He carries the thunderbolt ("vajra") as his weapon.
• His most famous deed is killing the serpent-demon Vritra, who had held back the waters; by killing Vritra, Indra released the rivers and brought rain.
• He is called "Purandara" (destroyer of forts), because he is said to have destroyed the forts of enemies.
• He drinks large amounts of soma, which gives him strength.
• He is described as a great warrior who helped the Vedic people in battles against their enemies.
• He is also associated with cattle raids and the release of cows.

Other Rigvedic gods:

• Agni (fire): the second most important god, with about 200 hymns; he was the messenger between humans and gods, carrying offerings to them.
• Soma: the god of the sacred drink.
• Varuna: the guardian of "rita" (cosmic order) and moral law; he punished wrongdoers.
• Surya and Savitri: gods of the sun.
• Ushas: the goddess of dawn.
• Vayu: the god of wind.
• The Ashvins: twin gods of healing.
• Maruts: the storm gods, companions of Indra.

Changes in the later Vedic period:

• Indra and Agni lost some of their importance.
• Prajapati (the creator) became the chief god.
• Vishnu and Rudra (later Shiva) became more important.

In later Hinduism:

Indra became a lesser god, the king of heaven (Svarga), but not a supreme deity.

Why not the other options?

• ✗Varuna is important in the Rigveda but has fewer hymns.
• ✗Vishnu is a minor god in the Rigveda, with only a few hymns.
• ✗Surya has fewer hymns.