Read the sentence

and ginny are going to ride in his car

which best identifies the best nominative pronoun to complete the sentence?

a. his
b. him
c. he
d. we

The answer is C. he. it sounds wrong, but technically that is correct.

Try plugging in each word into the sentence and the one that sounds right is probably the answer.
But to make things go by faster,
"He and Ginny are going to ride in his car."
The answer is C.

Sure but what’s your question?