Which of the following is true of Rig Veda?

Many hymns were chanted when sacrifices were performed, where people prayed for cattle, sons, good health etc.

The correct answer is Option 3 - Many were chanted when sacrifices were performed, where people prayed for cattle, sons, good health etc

There were several pre-existing traditions of thought, religious belief and practice, including the early Vedic tradition, known from the Rigveda, compiled between c.1500 and 1000 BCE. The Rigveda consists of hymns in praise of a variety of deities, especially Agni, Indra and Soma. Many of these hymns were chanted when sacrifices were performed, where people prayed for cattle, sons, good health, long life, etc. At first, sacrifices were performed collectively. Later (c. 1000 BCE-500 BCE onwards) some were performed by the heads of households for the well being of the domestic unit. More elaborate sacrifices, such as the rajasuya and ashvamedha, were performed by chiefs and kings who depended on Brahmana priests to conduct the ritual.