He doesn't smoke, nor I did.

Options

A. nor I smoke
B. nor I do
C. nor do I
D. No Improvement

Answer

C

Explanation

(3) nor (Conj., Adv.) : used before a Positive Verb to agree something Negative that has just been said.
• She doesn.t like them and nor does he.
• I.m not going and nor is he.
Hence, nor do I is the right usage.