Which of the following describes an optical property of a photodiode?

Correct option is C

​$$\text{An optical property of a photodiode relates to how it interacts with incident light.} \\[6pt]\text{The key optical parameter is \textbf{responsivity}, which measures:} \\[6pt]\bullet \ \text{How effectively the photodiode converts optical power into electrical current} \\[4pt]\bullet \ \text{The sensitivity of the device to light} \\[8pt]\text{Mathematically:} \\[8pt]\text{Responsivity} = \frac{\text{Photocurrent}}{\text{Incident optical power}}$$​​