At Some Temperatures,the Relative Reactivities of 3°,2° and 1° Alkane

Multiple Choice

At some temperatures,the relative reactivities of 3°,2° and 1° alkane hydrogens in free radical chlorination are in the ratio of 5:3:1.Thus,monochlorination of isopentane should produce these percentages of 2-chloro-2-methylbutane (A) ,combined 1-chloro-2-methylbutane and 1-chloro-3-methylbutane (B) ,and 2-chloro-3-methylbutane (C) :

A) 8% A,75% B,17% C
B) 25% A,45% B,30% C
C) 29% A,44% B,18% C
D) 30% A,35% B,35% C
E) 36% A,43% B,21% C