Which of the following options is true about Gotras?

The correct answer is Option 4 - All of these

Given options:

Option 1- The people (especially Brahmanas) were classified on the basis of Gotras.
Option 2- Each Gotras was named after a Vedic seer.
Option 3- All those who belonged to the same Gotras were regarded as his descendants.
Option 4- All of these

One Brahmanical practice, evident from c. 1000 BCE onwards, was to classify people (especially Brahmanas) in terms of gotras. Each gotra was named after a Vedic seer, and all those who belonged to the same gotra were regarded as his descendants. Two rules about gotra were particularly important: women were expected to give up their father’s gotra and adopt that of their husband on marriage and members of the same gotra could not marry.