Answer:
The given circuit is in
Series circuit is the one in which there is more than one resistor.
Combination circuit is the one in which gates are used to form the circuit.
Open circuit is the one in which there is no battery.
Parallel circuit is one in which current is divided in different paths.
Here, we can see that we have a battery in the circuit that means it is closed circuit.
And Current is divided that means it is parallel combination.
Therefore, Option D is correct that is parallel.