How is my father’s wife’s sister’s daughter related to me?

My mother’s sister’s husband’s only son’s sister is related to me as –

How is my father's brother's only sibling's mother related to my sister's only brother?

How is the son-in-law of my wife’s only sister related to my wife’s brother

How is my father’s sister’s only son’s sister related to me?NieceCousinSisterAuntNone of these

Pointing out to a lady, a girl said, "She is the daughter-in-law of the grandmother of my father's only son." How is the lady related to the girl ?Question 24Answera.Sisterb.Can't be determinedc.Motherd.Aun