Correct option is A
Explanation:
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Luminous Flux: This is defined as the measure of the perceived power of light. It quantifies the amount of light emitted by a source in a unit of time and is measured in lumens (lm).
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Watt: This is a unit of power, but it refers to the rate of energy transfer, not specifically to light energy.
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Candela: This is the unit of luminous intensity, which measures the amount of light emitted in a particular direction.
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Lumen: This is the unit of luminous flux itself, not the term for the light energy radiated per second.
