sir I forgot my registration no. and password. what i do....

Hey Sulochana!

Since you haven't mentioned the details regarding the registration form as in whose registeration form you are referring to and associated details, I would tell you in general sense that if you forgot your registration number then you may try recovering it from your mail. Just check your mail inbox once as you may find your details there and check out the saved documents in your device as you may also find it somewhere stored in your device. But, first check your mail and messages. And if you find your registration number, then you can click on the forgot password option while logging in. You can specify which registration form you are talking about in the comment section or you may repost your question with proper details.

Hello,

Your question seems incomplete as you haven't mentioned that of what application's registation number and password you forgot, without knowing the any  the name of the application we won't be able to help you out with your query, so I would request you to please mention the name of the application, so that we can help you out with your query.