Question

Sita passed slc and-----. 1.so do I 2.so does I 3.so did I 4.so I did

Answer 1

3. So did I.

4. is pass tense, 2.isn't grammatically correct, and 1. is as if you're in agreement.

3. is the only logical answer.

P.S.- when other questions that are similar to these come up a tip would be to place every sentence to complete the question.