The output $Y$ for the inputs $A$ and $B$ of circuit is given by

Truth table of the shown circuit is:

The output waveform of the given logical circuit for the following inputs A and B as shown below, is :

For the given logic gates combination, the correct truth table will be

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

A. It is a heavily doped p-n junction.

B. It emits light only when it is forward biased.

C. It emits light only when it is reverse biased.

D. The energy of the light emitted is equal to or slightly less than the energy gap of the semiconductor used.

Choose the correct answer from the options given below: