What Deficiency does the below rebus represent?

VIT_MIN

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Can you start the fire using two pieces of wood?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

There was a kingdom in which the king had no heir to take over his thrown. Even the queen was dead and he himself was on the verge of dying. He thought about it and then summoned all of the teenagers. He gave one seed each to all of them and asked them to grow the plant. He announced that the one with the most beautiful plant will become the king/queen of the empire after the death of the king.

After a month, all of them were called. The king looked at all of the plants but announced the girl with an empty pot as the queen of the empire. Why?

Prove that twice of ten is the same as twice of eleven.

Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?