Legality of Consent Form

My son is 7 years old and studying in 2nd standard. His school is organizing an Adventure camp inside the school premises next week. They have asked to submit a consent form (having parent's signature) along with an amount of money. The consent form doesn't state that it is compulsory to attend the Adventure camp. However, his class teacher has stated verbally that it is compulsory to attend the camp otherwise they will not give the final results. The consent form states as below: "I allow my ward ________of class _____sec _____ to attend the adventure camp and enclosing payment of Rs._______. I also understand the necessary safety measures will be taken for my ward in case of any mishap." There are few concerns as below which I would request you to address. I will be very thankful to you. 1. I want to understand that legality of this consent form. 2. Will the school be liable for any injuries or any mishap. OR will they be free from all the liabilities in case I sign and submit the consent form. 3. What if any mishap occurs during the camp. 4. Most importantly, can the school deny to give final result of my child in case we do not allow him to attend the camp. If they do what action can be taken against the school. 5. Also please advise laws/rules which I should be aware of in this regards. Thanks & Regards Ashu Sethi