Explanation:

- Law of conservation of energy: This is a fundamental principle stating that energy cannot be created or destroyed, only transformed.

- Option 2: Law of conservation of current: This is not a recognized conservation law. Current refers to the flow of charge, not something that is conserved in the classical physics sense.

- Law of conservation of angular momentum: This states that the total angular momentum of a closed system remains constant if no external torque acts on it.

- Law of conservation of charge: This principle states that the total electric charge in an isolated system remains constant over time.