What Deficiency does the below rebus represent?

VIT_MIN

What is more useful when it is broken?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

A man is sitting in a bar when a rich man sits next to him. He turns to the rich man and says, “Did you know I know almost every song that has ever existed?”

The rich man laughs. The man then says, “I bet you all the money you have in your wallet that I can sing a genuine song with a lady’s name of your choice in it. The rich man laughs again and says, “OK, how about my daughter’s name, Jamie Armstrong-Miller?” Minutes later, the man collects his cash and the rich man goes home cashless. What song did the man sing?

Find the next number in the following series:
6, 14, 26, 98, __?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What jumps when it walks and sits when it stands?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

A man was just doing his job when his suit was torn. Why did he die three minutes later?