If you got the enrollment id previously then scroll the message and the mail a bit. otp is written down below.

Hi Dear,

You will have to verify your email id and mobile number by entering the OTPs sent on your mail id and contact sms. Please check your spam folder if you are not receiving otp on your email id. otherwise contact helpdesk for immediate resolution. In case you fail to provide the correct otp then your verification will not be completed. So its important for you to provide correct email id and mobile number where you can receive otp for verification.

For more details visit:

https://university.careers360.com/articles/jam-application-form

Good Luck