Facial hair occur in some women due to

The correct option is C Hormone imbalance

Facial hair in some women occur due to over secretion of androgens. Androgens are sexocorticoids, a type of steroid hormones secreted from adrenal cortex. Androgens are secreted both in males and females but in a very less quantity in females. Principle androgen in males is testosterone which stimulate development of secondary sexual characters like facial hair. When hormonal imbalance occurs in females, androgens are secreted in more amount and this leads to development of facial hair.

So, the correct answer is 'Hormone imbalance'.