The term used when descent from father to son, grandson and so on:

Patriliny

The correct answer is Option 1 - Patriliny

The term used when descent from father to son, grandson and so on is called Patriliny.

Meanings of the remaining options:

Patriliny means tracing descent from father to son, grandson and so on.
Matriliny is the term used when descent is traced through the mother.
Polygyny is the practice of a man having several wives.
Polyandry is the practice of a woman having several husbands.