Question

Can anyone please explain me this answer?

Answer 1

the answer says 1 and 2 are the only answers
Can anyone explain why is it 1 and 2 and why not 3 as well?

Answer 2

If you consider the structure in 3) You see CH3 CH2 CH2 CH3 free radical joint to CH3 CH3 free radical..According to the question, there should be two propane free radicals being joint, but here it is different, u would notice that 1st and 2nd part has propane joint

Answer 3

Wait CH3 CH2 CH2 CH3? isnt it suppose to be CH3 CH2 CH(CH3)CH2 CH3?
But I'm sorry lol I didn't exactly get what you said ^^