The stability of given free radicals in decreasing order is:
`(i) CH_(3)-CH_(2)" "(ii) CH_(3)-CH-CH_(3)" "(iii) CH_(3)underset(CH_(3))underset(|)overset(*)C-CH_(3)" "(iv)overset(*)CH_(3)`
A. `iii gt iv gt I gt ii`
B. `I gt ii gt iii gt iv`
C. `iii gt ii gt iv gt i`
D. `iii gt ii gt I gt iv`