Question

"Tell Susan its Marys turn not hers" A.Tell Susan it's Mary's turn,not hers. B. Tell Susan its Marys ' turn not hers. C.Tell Susan it's Marys' turn not hers. C Tell Susan its Mary's turn ,not hers.

Answer 1

A.Tell Susan it's Mary's turn,not hers

Step-by-step explanation:

Answer 2

A. is the correct answer. (Grammatically)
Apostrophes are used as either a substitute for is or for showing possession.
is- "Tell Susan it's.."
possession- " Mary's turn not hers."

Hope this helps,
-Starry