For an ideal diode,in forward and reverse biased condition the resistance is respectively

In which figure,the junction diode is forward biased?

In a $PN-$ junction diode not connected to any circuit:

The ratio of the resistance of a $P-N$ junction diode in forward bias to its resistance in reverse bias is approximately:

$A$ silicon diode has a forward voltage drop of $1.2\, V$ for a forward $DC$ current of $100\, mA$. It has a reverse current of $1\times10^{-6}\, A$ for a reverse voltage of $10\, V$. The bulk and reverse resistances of the diode are:

In the following circuit,the equivalent resistance between $A$ and $B$ is