Answer
Ia>Ib=Ic=Id
Work Step by Step
The current through Bulb A is the greatest. At the junction current splits into two branches equally. In the second branch, bulb C and Bulb D are in series as a result the current passing through both these bulbs is equal. the same amount of current passes through bulb B. The resistance of each bulb is same, thus the power dissipated depends on the current.
