In the SN2 reaction of cyanide ion with (CH3)2CHCH2CH2X what is the relative order (best to worst leaving group) of reactivity for the following X substituents?

1. X=F
2. X=C1
3. X=Br
4. X=I

A) 1> 2 > 3 > 4
B) 4> 3 > 2 > 1
C) 3> 1 > 2 > 4
D) 2> 3 > 4 > 1

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

hope this

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.