Hey

When I gave my 12th boards from CBSE I gave my biology answer sheet for scrutiny and my marks were increased by 25 so yes I think getting 5 marks is not that difficult if you have earned it, if your answers actually deserve the marks you will get it.

According to CBSE

The verification means:
Checking whether all answer have been evaluated,
That there has been no mistake in the totaling of marks for each question in that subject,
That the marks have been transferred correctly on the title page of the answer book and to the award list,
Whether the supplementary answer book(s) attached with the answer book mentioned by the candidate are intact,
No revaluation of the answer book or supplementary answer book(s) shall be done.

I hope this answer helped. All the best.