In the circuit diagram shown in figure,a fuse bulb can cause all other bulbs to go out. Identify the bulb

In the circuit shown in figure bulb will become suddenly bright if :-

In the circuit shown in figure, if both the bulbs B_(1) and B_(2) are identical:

In the circuit in figure given below all four bulbs are identical. How do the brightnesses of the bulbs compare ?

In the circuit shown in the figure, if both the bulbs B_(1) and B_(2) are identical

In the circuit diagram, all the bulbs are identical. Which bulb will be the brightest?