Which is correct?

[Jacqueline]

Please help me with the following sentences:

a) Which sentence is correct?
i. My shirt has five buttons.
ii. I have five buttons on my shirt.


b) Which preposition should I use?
i. I have a collar in my jacket.
ii. I have a collar on my jacket.

Thank you.

[Rusty]

Please help me with the following sentences:

a) Which sentence is correct?
i. My shirt has five buttons.
ii. I have five buttons on my shirt.


b) Which preposition should I use?
i. I have a collar in my jacket.
ii. I have a collar on my jacket.

Thank you.

a) Which sentence is correct?
i. My shirt has five buttons. (Correct).
ii. I have five buttons on my shirt. (Correct).


b) Which preposition should I use?
i. I have a collar in my jacket. (Incorrect).
ii. I have a collar on my jacket. (Correct).