The two sentences that have pronouns used incorrectly are:
C. What where you're* going!
D. Your* going to the market?
Sentence C not only has a misused pronoun, it also is poorly worded, grammatically incorrect, and meaningless. It should say, guessing the sense of what was meant: Where you were going! Here the pronoun is you, the second-person personal pronoun (either singular or plural).
Sentence D should say: you´re going to the market? Here, the pronoun used is the same as above, but with an added contraction (you´re) that means: you are.
