For the output of the following logic circuit to be 'I', the values of inputs A and B should be respectively

Two identical ideal diodes are connected to an ammeter and a d.c source (1 volt) as shown. In which one of the following circuits, ammeter will not show any deflection?

When the temperature of a semiconductor is increased, its resistance and electric conductivity respectively.

For a two input AND gate, the four entries are shown in the truth table. Identify the correct ones out of these $$(\mathrm{A}, \mathrm{B}=$$ input, $$\mathrm{Y}=$$ output)