Hello,

NO YOU CAN'T!!!!!!
Everybody has only ONE original CATEGORY to which they belong. And, If Someone Wants to register through the Reserved categories, they need to Produce their CASTE CERTIFICATE at the time of JEE registration and also during admission.

Now, the thing is, if you are General, YOU SHOULD NEVER THINK OF APPLYING THE NEXT TIME THROUGH A RESERVED CATEGORY, because that asks for a VALID CERTIFICATE.

And if you're from some Reserved Category, And you registered as a General candidate, Then you may register the next time with your Original Category ONLY IF YOU HAVE THE CERTIFICATE PROVING THAT YOU REALLY BELONG TO WHAT YOU ARE CLAIMING.

I hope this would help you. For further queries please feel free to write me down in the comment box.