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.
When Anuj saw Manish, he recalled, "He is the son of the father of my daughter." Who is Manish ?
Anuj's daughter's mother -- Anuj's wife;
Anuj's wife's father -- Anuj's father-in-law;
Father-in-law's son -- Anuj's brother-in-law.
So, Manish is Anuj's brother-in-law.