They are all out there being used by various people.
I use the
first one because it is more popular where I live, but I think the second version
makes more "sense."
MAN: (Version A)
The first part of this sign is similar to the sign "father" and then moves
down to touch the chest.
(p.s. If you start this sign at the chin and move it down to the chest
it means "woman.")
(p.p.s. No, I don't know where you can buy a cool sweater like the one
I'm wearing here.)
(p.p.p.s. No, it doesn't matter how much you offer me, I won't sell you mine.
It was a gift.)
MAN: (Version B)
MAN: (Version C)
Note: this version isn't used much.
This third version could be used to indicate that someone
is no longer a child but is a man (male + adult).