L is the daughter of a woman described as the daughter of the father in law of the wife of the brother of K. Based on this chain of relations, how is K related to L?

Introduction / Context:
This is a multi step blood relation puzzle where every phrase adds another link in the chain. The question describes L as the daughter of a woman who is defined through K, K's brother, that brother's wife and the father in law. The goal is to simplify this long phrase step by step until we see the simple relationship between K and L. These questions train careful reading and systematic construction of family trees.

Given Data / Assumptions:
• K has a brother.• That brother has a wife.• The father in law of this wife is the father of her husband, that is, the father of K's brother.• The woman who is mother of L is a daughter of that father in law.• Standard exam convention usually treats K as male.• We assume a normal family with no adoptions unless stated.

Concept / Approach:
The key is to identify the person described as the father in law of the brother's wife. This person is the father of both K and K's brother. His daughters are therefore sisters of K and K's brother. The woman who is mother of L is such a daughter. Thus L is the child of a sister of K. When someone is the child of a person's sister, that person is a maternal uncle of the child. Under the usual assumption that K is male, K is uncle of L.

Step-by-Step Solution:
Step 1: Let the brother of K be B and his wife be W.Step 2: The father in law of W is the father of B, call him F.Step 3: F is the father of B and, by symmetry, also the father of K, because they are brothers.Step 4: The mother of L is described as the daughter of F.Step 5: Hence the mother of L is a daughter of F and therefore is a sister of K.Step 6: L is the daughter of this sister, so L is a niece of K.Step 7: Therefore K is uncle of L.

Verification / Alternative check:
Construct a small family diagram. Place F at the top with at least two sons, K and B, and at least one daughter, who is the mother of L. B is married to W, making F the father in law of W. The daughter of F is the sister of K and B. She has a child, L. That child is a niece to both K and B. Since the question asks for how K is related to L, the answer is uncle. No alternative configuration gives a closer standard relation with the same wording.

Why Other Options Are Wrong:
Son of L: This would reverse the generation order and is not possible, as K is in the generation above L.Aunt of L: This would require K to be female, but the puzzle and options are conventionally set with K as male.Relationship cannot be determined: The chain is complex but completely solvable step by step.Grandfather of L: A grandfather would be father of L's mother, which is F, not K.

Common Pitfalls:
Candidates sometimes confuse whose father in law is being described, or they treat the daughter of the father in law as the wife of the brother, rather than as a separate daughter. If one rushes, it is easy to lose track of the chain and think the relation is ambiguous. Working slowly from the inner phrase outward and drawing the structure usually reveals that K is the uncle of L.

Final Answer:
K is the uncle of L.