Which of the following bonding patterns DOES NOT happen?

C-H-C

=C=

H-H

All of these bonding patterns can happen.

3 answers

The first one. To do so would give H two bonds when it can have only one bond.
Which of the following bonding patterns DOES NOT happen?
Question 3 options:

a)
C-H-C


b) =C=

c) H-H

d)
All of these bonding patterns can happen.
first one