If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?

Q. If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?

1. Wash the hand with saline solution.
2. Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate.
3. After washing with plenty of water and apply solution of sodium hydroxide on the hand.
4. Neutralise the acid with a strong alkali.

Answer: Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate.