Since it is too late to answer your query, The counselling result has been announced. As you asked the question-

If you are allotted the seat then you will be required to choose option-

OPTION 1: Choose this if one wishes to 'ACCEPT THE ALLOTTED SEAT' and 'DO NOT WISH TO PARTICIPATE' in the further rounds of counselling.

OPTION 2: Choose this to 'ACCEPT THE ALLOTTED SEAT' and 'WANT TO PARTICIPATE’ in the next round of AIIMS PG 2019 counselling.

OPTION 3:Choose this to 'DECLINE/REFUSE THE ALLOTTED SEAT' and 'DO NOT WISH TO PARTICIPATE’ in the subsequent round of AIIMS PG counselling 2019

OPTION 4:Choose this if you wish to 'DECLINE/REFUSE THE ALLOTTED SEAT' and 'WANT TO PARTICIPATE’ in the next round of counselling.

If you have selected the Option 2 that means you accept the seat but you wish to participate for the further round.

If you have selected the Option 4 that means, You decline/ Refuse the allotted seat and want to participate the further rounds.

So it depends which option you have opt.

Good Luck!