Sorry for the delayed response - I hope you are still waiting on your interview. It is not clear which country you got married in. If the place of marriage was India, then under the Hindu Marriages Act 1955, the information in the passport - "separated" - has full legal validity. You will mark 'legally separated' in DS 160. Since it looks like that was not done, the officer will simply seek clarification on your marital status. Answer the situation as it is frankly - your privacy will be respected.