Arrangements of `(CH_(3))_(3)C-,(CH_(3))_(2)CH-,CH_(3).CH_(2)-` when attached to benzyl or `n` unsaturated group in increasing order of inductive effects is:

The arrangement of (CH_(3))_(3)C-,(CH_(3))_(2)CH-,CH_(3)CH_(2)- when attached to benzene or unsaturated group in increasing order of inductive effect is

The order of +I effect is: (CH_(3))C gt (CH_(3))_(2) CH gt CH_(3)CH_(2) gt CH_(3)

When -CH_(3), CH_(3) - underset(CH_(3))underset(|)(CH) - " and " CH_(3) - underset(CH_(3))underset(|) overset(CH_(3))overset(|)C - groups are introduced on benzene ring then correct order of their inductive effect is