What are the states of the three ideal diodes of the circuit shown in figure?

Assuming the diodes $${D_1}$$ and $${D_2}$$ of the circuit shown in the figure to be ideal ones, the transfer characteristics of the circuit will be

Consider the circuit shown in figure. If the $$\beta $$ of the transistor is $$30$$ and $${{\rm I}_{CBO}}$$ is $$20$$ $$nA$$ and the input voltage is $$5V$$ then the transistor would be operating in

For given sinusoidal input voltage, the voltage waveform at point $$P$$ of the clamper circuit shown in figure will be