What Deficiency does the below rebus represent?

VIT_MIN

You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles, and 2 empty bowls. He then says, 'Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die.'

How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?

Why do people go to bed?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

Can you find the thief by just looking at the picture below?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?