What Deficiency does the below rebus represent?

VIT_MIN

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

In the image given, you can find several triangles. Can you count them all?

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

Two old friends, Jack and Jill, meet after a long time, and discussing as:

Jack: Hey, how are you, man?

Bill: Not bad, got married and I have three kids now.

Jack: That's awesome. How old are they?

Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.

Jack: Cool..But I still don't know.

Bill: My eldest kid just started taking piano lessons.

Jack: Oh, now I get it.

How old are Bill's kids?

If a wheel has 54 spokes, how many spaces are there between the spokes?

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Look at the picture and find out which square is not linked with any of the other squares.

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.