Question

Question #29e69

Answer 1

Because it mostly occurs in cyclic form which is quite stable.

Explanation:

In the `beta`-D glucose, the `OH` group and other substituents in the ring lie equatorial to the axis. This reduces steric hindrance, making its chair-conformation more stable.

Give a read to the link below, it might will help you out:
https://socratic.org/questions/why-is-d-glucose-the-most-common-aldohexose-in-nature