Exam 312-50v10 topic 1 question 91 discussion

A Yagi antenna, also called YagiUda antenna, is a unidirectional antenna commonly used in communications at a frequency band of 10 MHz to VHF and UHF.

Also called a "beam antenna",[4] or "parasitic array", the Yagi is very widely used as a high-gain antenna on the HF, VHF and UHF bands.[3][4] It has moderate to high gain which depends on the number of elements used, typically limited to about 20 dBi,[3] linear polarization,[3] unidirectional (end-fire) beam pattern[3] with high front-to-back ratio of up to 20 dB. and is lightweight,

Yagi is correct. It the only antenna listed that works in a low enough frequency. Its frequency range is 3 -3000Mhz. Dipole work in the 30 -300Mhz range

I believe its dipole antenna