Is this sentence correct?

[Dawood Usmani]

Dear teachers!
Is this sentence correct?

Q: What are the kinds of vitamins and what are their roles in the body?


Thanks a million!
Dawood

[rks]

(not a teacher)

Dear teachers!
Is this sentence correct?

Q: Please mention the different kinds of vitamins and its role in the body?


Thanks a million!
Dawood

[moniza]

(not a teacher)

I'm a student , not teacher.
[What are the kinds of vitamins and what are their roles in the body]
It may be " What kinds of vitamins and their roles in the body"

[Dawood Usmani]

(not a teacher)

Why did you use ITS in your version? Was that for kinds which is plural or for vitamines that is also plural?

[David L.]

What are the kinds of vitamins

What is the correct answer you are hoping for in asking this question?

[Dawood Usmani]

What are the kinds of vitamins

What is the correct answer you are hoping for in asking this question?

Someone sent me a piece of paper asking this question but to me it's incorrect but as I'm not very good at English I posted this question on the forum in order to get the answer.
Well, I think it must be " How many kinds of vitamins are there and what are their functions in our body?"
Is my version correct?
Dawood

[Raymott]

Someone sent me a piece of paper asking this question but to me it's incorrect but as I'm not very good at English I posted this question on the forum in order to get the answer.
Well, I think it must be " How many kinds of vitamins are there and what are their functions in our body?"
Is my version correct?
Dawood

The original sentence is grammatical enough, but it contains ambiguities.
First, what is a "kind" of vitamin? I could say that there are two kinds - fat-soluble and water-soluble. I could say that there are A, B, C, D, E, H etc.
But then I'd have to expand B1, B2, B3, etc.
Secondly, is the question asking what the role of the "kinds" are, or the role of the individual vitamins in that kind? Vitamins C and B1 are both water-soluble. But they have totally different functions. So differentiating the roles of these two "kinds" is futile.

How to phrase the question depends on what you want to know.