conditionals

[Pief]

My question is: Which of these sentences is right and why?

1.If I am given a choice, I would prefer...
2. If I am given a choice, I will prefer...
3. If I will be given a choice, I would prefer...
4. If I were given a choice, I would prefer...
5. If I will be given a choice, I will prefer...

There is a possibility that in future I will be able to choose something and I want to express my future preference in a very modest, submissive and polite way. I know some of the rules about conditionals and according to them the second possibility is the right one. But somehow, I feel like that "would" is important there because, as I said, I want to express my future preference in a very modest, submissive and polite way.

Please help :) Thank you.

P.S. "a choice" or "the choice"?

[5jj]

I don't think you really intend to be sumissive - submissive adjective - definition in British English Dictionary & Thesaurus - Cambridge Dictionary Online.

Your best choice is #4. If I were given a choice, I would prefer...

[Pief]

Why? Why not 1. or 2.? Can I really use 4. when I am talking about future?

[bhaisahab]

Why? Why not 1. or 2.? They are possible, #4 is better. Can I really use 4. when I am talking about future? Yes.

Bhai.

[5jj]

We have the choice between a real possibility, #1 or #2, a hyypothetical possibility, #4, or unnatural English, #3 or #5.

If we have a real possibility, hypothetical 'would' in #1 is inappropriate.

We may talk about a future choice, but not normally a future preference, which knocks out #2.

That leaves us with #4. That's just about possible, though this would be more natural as : If I were given the choice, I'd choose/go for/selct/settle on ...