Which of the following statements is not correct in the case of light emitting diodes?

Photodiodes are mostly operated in reverse biased condition because

Which one of the following statements is '$WRONG$' regarding $LED$?

Statement $-I$: $A$ photodiode operates in reverse bias.
Statement $-II$: The fractional change due to the photo-effects on the minority carrier dominated reverse bias current is more easily measurable than the fractional change in the forward bias current.

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Photodiodes are preferably operated in reverse bias condition for light intensity measurement.
Reason $R$: The current in the forward bias is more than the current in the reverse bias for a $p-n$ junction diode.
In the light of the above statements,choose the correct answer from the options given below:

Explain why elemental semiconductors cannot be used to make visible $LEDs$.