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

Omnidirectional antennas radiate energy equally in all horizontal directions and are not specifically designed or widely deployed for the 10 MHz to VHF/UHF frequency range described.

A dipole antenna resonates at a single frequency determined by its physical length and is not commonly deployed across the broad 10 MHz to VHF/UHF spectrum in the versatile way a Yagi is.

The Yagi-Uda antenna uses a driven element, a reflector, and one or more directors to achieve high directional gain across a wide spectrum, making it practical from 10 MHz in the HF band through VHF and UHF. Its scalable element design allows it to be tuned for different frequencies within this range, and it is extensively used in terrestrial communications, amateur radio, and TV reception within these bands.

Parabolic grid antennas are optimized for microwave frequencies in the GHz range (such as satellite and point-to-point links) and are not suited for the 10 MHz to VHF/UHF band.