Question

which star was preferred for measuring latitude using the astrolabe
sirius
polaris
vega
betelgeuse

Explanation:

Polaris, also known as the North - Star, is nearly aligned with the Earth's axis of rotation. Its position in the sky makes it very useful for navigation, especially for determining latitude in the Northern Hemisphere using an astrolabe. Other stars like Sirius, Vega, and Betelgeuse do not have this special alignment with the Earth's axis for latitude - measurement purposes.

Answer:

B. Polaris