Assertion: A middle aged woman is reported to have small breasts and undersized uterus.
Reason: Her genotypic analysis shows XO condition of allosomes.

If both assertion and reason are true and reason is the correct explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If both assertion and reason are false

Solution

If both assertion and reason are true and reason is the correct explanation of assertion.

Females having 45 chromosomes (2A + XO) are affected with Turner's syndrome. Individuals having Turner's syndrome have female sexual differentiation but ovaries are rudimentary. Other associated phenotypes of this condition are short stature, webbed-neck, broad chest, lack of secondary sexual characteristics and sterility. Thus, any imbalance in the copies of the sex chromosomes may disrupt the genetic information necessary for normal sexual development.