Hello,

Your question seems incomplete as you have not mentioned the name of the examination of which you have forgot the password and Registration number. but don't worry, most of the authorities share the login details through the mail or SMS you get after the Registration. You may please check that Mail or SMS, hope it will resolve your issue.

In case you have lost that Mail or SMS then kindly contact their authorities so that they can help you out.

Hope this help, all the best.