Upvote:1
I definitely recommend mentioning the visa. After all, you donβt want to not mention it and then be refused if they uncover this information.
What I suggest to do is to:
State correctly that you have been issued a visa before, and been to India.
State "Yes. See attachment 1" in "Have you ever visited India?" question.
Add a document titled "Attachment 1" where you explain that your previous passport with Indian visa and travel details is not returned to you, and thus you do not have those details. State the year where you been issued a visa, and a year when you visit, if you remember. This should be enough.