Which of the following antennas is commonly used in communications for a frequency band of 10 MHz to VHF and UHF?

Omnidirectional antennas radiate signal equally in all horizontal directions and are not specifically associated with the 10 MHz to UHF frequency range in communications systems.

A basic dipole antenna is resonant at a single frequency and is not commonly described as a broadband solution spanning from 10 MHz through UHF.

The Yagi-Uda antenna uses a driven element, a reflector, and multiple director elements to achieve high gain and directivity across a broad frequency range from 10 MHz (HF) through VHF and UHF. Its scalable design makes it practical for point-to-point communications, amateur radio, and TV reception in these bands. It is one of the most commonly deployed antennas for this specific frequency span.

Parabolic grid antennas are designed for microwave frequencies well above UHF and are not used for the 10 MHz to UHF range.