Which of the following measurements are made using a multimeter?

A multimeter, historically known as a VOM (Volt-Ohm-Milliammeter), is a combined testing unit designed to measure the most fundamental electrical properties: voltage, resistance, and current. While highly versatile for basic troubleshooting, standard multimeters cannot measure complex or high-frequency radio properties. Signal strength and noise require specialized RF equipment, such as an oscilloscope or a receiver's S-meter. Similarly, impedance and reactance are AC properties that vary with frequency. Measuring these requires a specialized tool like an antenna analyzer or an LCR meter, meaning "Voltage and resistance" is the only correct choice here.