Which of the following is a common application of Voltage-Controlled Oscillators (VCOs)?

Correct option is B

​$$\text{A \textbf{Voltage-Controlled Oscillator (VCO)} generates an output signal whose \textbf{frequency varies based on the input control voltage}.} \\[6pt]\text{This makes it essential in systems where precise and tunable frequency generation is needed.} \\[8pt]\textbf{Common applications of VCOs:} \\[4pt]\bullet \ \textbf{Frequency synthesizers} \text{ (PLL circuits)} \\[2pt]\bullet \ \textbf{Modulators} \text{ (FM, PM)} \\[2pt]\bullet \ \textbf{Clock generation in communication systems} \\[8pt]\text{Thus, VCOs are widely used in \textbf{frequency synthesizers}, not memory, power amplification, or temperature sensing.}$$​​