What Deficiency does the below rebus represent?

VIT_MIN

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

When 99 is considered higher than 100?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Can you name some countries which do not have the alphabet 'A' in them?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Can you start the fire using two pieces of wood?