Answer: The correct answer is Image C.
Step-by-step explanation:
Resistors are the substances which resist the flow of current through a conductor. They are expressed in Ohms

There are two ways in which resistors are connected:
1. Series circuit: This circuit is defined as the circuit in which current flowing through each of the resistors remains the same but the potential difference across the circuit is the sum of individual potential differences across each resistor. The total resistance is greater than the lowest resistor. Formula used to calculate resistance is:

2. Parallel circuit: This circuit is defined as the circuit in which, the potential difference flowing across each of the components remains the same and the total current flowing is the sum of the current flowing through each component. The total resistance is smaller than the lowest resistor. Formula used to calculate resistance is:

From the given images, the current flowing through the resistors in Image C is the same and hence this indicates a series circuit.
Therefore, the correct answer is Image C.