explain with proper steps answer given is 1 - Chemistry - Hydrocarbons

Question

explain with proper steps answer given is 1

Vartika Jain · Accepted Answer

Dear Student,

<img alt="" src=
"https://s3mn%20mnimgs%20com/img/shared/ck-files/ck_58da49ade97db%20png"
style="width: 746px; height: 89px;">
Hence, correct answer is (3)

explain with proper steps. answer given is 1