A. Its a sunny day.
B. It's a sunny day.
C. Its' a sunny day.
D. Its's a sunny day.
Answer: It's a sunny day.
A. Its a sunny day.
B. It's a sunny day.
C. Its' a sunny day.
D. Its's a sunny day.
Answer: It's a sunny day.
Additional Information: It's is a contraction for 'it is' or 'it has'.
Subjects: Punctuation, Grammar