Which sentence about knowing the answer is grammatically correct?

1. A Option A: If I knew the answer, I would tell you.
2. B Option B: If I knew the answer, I will tell you.
3. C Option C: If I would know the answer, I would tell you.
4. D Option D: If I know the answer, I would tell you.

Answer checked 11 October 2026 · How we write and check questions