What is the common name of the given compound?

Isobutyl chloride n-Butyl chloride sec-Butyl chloride tert-Butyl chloride

n-Butyl chloride

The compound shown is 1-Chlorobutane which has 4 C atoms in the parent chain and the only halogen compound present at the end of the chain. This type structure has the prefix n- in the common name. So, the name of the compound will be n-Butyl chloride.