Hey Harshdeep,

In GPAT, If you want to review the question later you can put flag (Review later) Option. question under review doesn't effect marks. It will simply indicate as reviewed later. So any question can be marked as reviewed later irrespective of answered or unanswered. There will be two cases, if a flagged question is not answered, you will not get any positive or negative marks as the question was not answered. Other side, if question was answered and marked as reviewed you may get postive marks or negative marks based on correctness of the answer.

so,The questions that you have attempted and left for review will be saved as your answers. It will be taken into consideration and evaluation will be done according to your total attempted questions.

Hope it helps!

Good Luck