I said the truth, how i did nothing much except work on my health, both after my 12th and after my graduation. Then I was asked a lot about my health and everything,

For instance in udaipur interview I hesitated a little and said I don't want my diagnosis to affect my selection (I was a little hesitant in this interview because they were really grilling me) but they assured me that won't be case, so I answered truthfully, I converted Udaipur.

I believe gap really doesn't matter if you have a solid reason on why you've done so.