The correct options are
A Voltmeter
D Multimeter
A voltmeter can measure the electric potential difference between two points. A voltmeter is connected in parallel to measure the potential difference between two points.
A multimeter is a device which can measure potential difference, DC voltage, AC voltage, current and resistance of a conductor. Hence voltmeter and multimeter can be used to measure the electric potential difference between two points.
Ammeter and Galvanometer is used to measure current in the circuit.