Noun classifications also include a syntactic category classification, which incorporates masculine and female categories. A monk may be a a part of a spiritual group of men, specifically. Now, a monk is, in obvious ways, a masculine category. Here, we are asked the feminine category of a monk, and while watching the choices, one generally gets confused as there are many words which uses a “she” or a “lady” as a prefix while converting a male kind of the noun to a female form or noun. The word “nun” is sometimes used for a female, who could be a a part of a spiritual group of this particular gender. Nun is usually said as female monks. Although, in many English communities, a monk is employed for both male and feminine ascetics from any religious background. On the opposite hand, if we glance in any respect the opposite options, we may be told that the words “monkess”, “she-monk” and a “lady monk” hold no meaning within the dictionary, which implies the words are vague.
Hence, option d. that is, Nun is that the correct answer to the current question.