Re-totaling or verification of answer sheet??

Dear Friendz

One of my friend has got 144 marks this time in IPCC exams.

He is making claim that due to somehow, he could not write his roll number in second exam sheet obtained in IT &SM Paper. He has got 42 marks in that and claiming that his exam was very good and probably his that answersheet may not get checked due to non-writing of roll number there as he is quite sure to get over 60 in this

So now, what should he do, whether he should go for re-totaling for marks or seeing his answer sheet as if he selects the option of seeing his answersheet, he may not get chance for re-totalling

Please suggest the best possible option should be exercised

Thanks