Kirchhoff's Second Law is based on law of conservation of ______.

The correct answer is Option (2) → Energy

Kirchhoff's second law (the loop rule) says that the algebraic sum of the changes in potential around any closed loop is zero. A charge that goes once round a closed loop returns to its starting point, so its potential energy cannot change: the energy gained in the cells equals the energy lost in the resistors. This is the law of conservation of energy.

Note: A similar question was also asked in CUET (UG) 2025 on 13-05-2025 (Slot 1).