Hydrogen Bonds?

Question

Which of the following molecules can form hydrogen bonds with other molecules of the same kind:

1) CH3F
2) CH3NH2
3) CH3OH
4) CH3Br

Explain your choice(s)

Answer 1

I believe it's 2 & 3, for hydrogen bonding to occur it is necessary for hydrogen to be attached to a small, electronegative element such as oxygen, nitrogen, and fluorine.