a.), b.), and d.) are the same circuit.
Work Step by Step
Circuits a.) and b.) are the same because the current delivered from the battery travels to the wire junction at the top middle of the circuit where continues to the capacitor and some splits of an goes into the resistor. The current then travels back to the battery. c.) is not the same as a.) and b.) because all current travels through the resistor on the top of the circuit before reaching the capacitor. d.) IS the same as a.) and b.) because the current splits at the top where some goes to the resistor and some goes to the capacitor. The current then travels back to the battery. In conclusion, a.), b.), and d.) are the same circuit while c.) is dissimilar.