thanks for the reply.i have some more queries.I was going through some quora posts about COAP 2018.I came across this link:https://www.quora.com/Do-I-need-to-mention-the-score-of-previous-attempts-of-the-GATE-in-the-COAP-portal-Will-failing-to-do-this-make-me-be-disqualified-at-it#The 2nd paragraph confused me. because I have registered every form and COAP 2018 through previous 2017 gate score(which is best among 2017 and 2018) . Will it create problem if i mention  2018 gate score too in the COAP form?  

Hey I did the registration without entering the details of 2016 gate score, what to do now? 

My score in 2016 was low So I didn't care to dwnld the scorecard. I forgot the 2016 credentials and cant dwld also to retrieve the password u need to have the registered phone no. which I dont have...

@K Rahul .Did u have valid gate score of 2016? If not valid,you dont need to worry about that.Valid scores are only required in Coap.