Correct Answer - 4
`CH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(3)underset(hv)overset(Cl_(2))rarr`
(1) `underset(Cl)underset(|)CH_(2)-CH_(2)-CH_(2)-CH_(2)-CH_(3)`
(2) `CH_(3)-underset(Cl)underset(|)CH-CH_(2)-CH_(2)-CH_(3)(+-)+`
(3) `CH_(3)-CH_(2)-underset(Cl)underset(|)CH-CH_(2)-CH_(3)`
Total number of products = 1+2+1=4