Answer: Option (d) is the correct answer.
Step-by-step explanation:
Ammeter is a device which is used to measure the current in ampere. Whereas voltmeter is a device which is used to measure the voltage in volts.
For example, in a series circuit same current flows through each part whereas there is difference in voltage according to the size of resistor.
So, to measure the voltage of a device voltmeter must be connected in parallel to the respective device. Whereas in order to measure the current of the same device, an ammeter must be connected in series with the respective device.
Thus, we can conclude that out of the given options current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmeter.