Which sentence has correct punctuation? a. I got a tutor to help me with biology, chemistry, physics, and algebra. b. I got a tutor to help me with biology, chemistry physics and algebra. c. I got a tutor, to help me with biology, chemistry, physics and algebra.

The answer is A. I got a tutor to help me with biology, chemistry, physics, and algebra.

A Is the correct sentence.B is incorrect because commas in list appear as:  item 1, item 2, item 3, AND(comma before the and) item 4.The fixed sentence should be:  I got a tutor to help me with biology, chemistry, physics, and algebra.C is incorrect because commas should not cut off essential information.:  To help me with biology is essential information, otherwise, we would have:  I got a tutor chemistry, physics, and algebra.The fixed sentence should be:  I got a tutor to help me with biology, chemistry, physics, and algebra.