Hi Sushma,

I think you forgot to mention the name of exam you are referring to.

Whenever you forget application number of any of exam or any college then you are required to mail the authorities explaining your issue and request them to find your application form and let yourself know about your application number.

If you would have mentioned the name of exam, I would have helped you in a better way.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!