Which of the following diodes shown in figure, is forward biased ?

Assuming the diodes to be of silicon with forward resistance zero, the current $I$ in the circuit shown in figure is :

In the given circuit of figure, the current through the battery is

Two ideal diodes are connected to a battery as shown in figure in the circuit. The current supplied by the battery is

The voltage drop across a forward biased diode is $0.7$ volt. In the given circuit, the voltage across the $10\Omega$ resistance in series with the diode and $20 \Omega$ resistance are