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Which 70 cm frequency is authorized to a Technician Class license holder operating in ITU Region 2?
443.350 MHz

Exposition

A person could either memorize that the 70 cm band runs from 420 MHz to 450 MHz, or a person could convert the wavelength to a frequency and pick the closest answer.

$\lambda=\frac{c}{v}$ or $\text{wavelength}=\frac{\text{speed of light}}{\text{frequency}}$
$\lambda*v=c$
$v=\frac{c}{\lambda}$
$v=\frac{3*10^8}{70cm}$
$v=\frac{300,000,000}{.70}$
$v=428,571,428.571$

443.350 MHz is the closest given answer.