In decipher jumbled up description type of questions, a round-about description is given in the form of certain small relationships and direct relationship between the persons concerned is to be deciphered.

A girl introduced a boy as the son of the daughter of the father of her uncle. The boy is girl`s

A. Brother
B. Son
C. Uncle
D. Son-in-law
E. Nephew
Answer: A . Brother

Justification: Daughter of uncle's father -- Uncle's sister -- Mother;
Mother's son -- Brother.