Why does microwave oven heats up a food item containing water molecules most efficiently?

Options

A. Infra-red wave produce heating in a microwave oven
B. The frequency of the microwave must match the resonant frequency of the water molecules
C. The frequency of the microwave has no relation with natural frequency of water molecules
D. Microwave are heat waves, so they always produce heating

Answer

b

Explanation

For efficient working of microwave oven, the
frequency of microwave must match the resonant
frequency of the water molecules, then maximum
heating is produced.