Your sister's brother's cousin's brother+in+law is your which relation ?

Your

Sister's

Brother's

Cousin's

Brother in law

is your BROTHER IN LAW !!

What relation is your daughter's grandmother's husband's son to you ?

What relation is your aunt's niece's uncle's son to you ?

What relation is your husband's daughter's sister's father to you ?

What relation is your aunt's daughter's mother's granddaughter to you ?

What relation is your cousin's sister's brother's son to you ?

What relation is your father's sister's daughter's wife to you ?