What is the term for the pattern of spiral impressions inside a handgun?

Arifling
Bejector markings
Clands and grooves
Dextractor markings

Verified Answer :

It's called rifling, to stabilise the bullet.

The correct choice is

A) rifling

Rifling is a pattern of sequence of raised and recessed portions. These raised portions are known as lands and recessed portions as grooves. these lands and grooves helps in providing spin to the bullet as it is fired. This spin makes the bullet to penetrate deeper into the target and cause severe damage.