Arun is the father of B, but B is not the son of Arun. In this situation, what is the relationship of B to Arun?

Introduction / Context:
Blood relation questions often play with gender words like son, daughter, brother and sister. Here, you are told that Arun is the father of B, but B is explicitly not described as Arun's son. You must use this information to deduce the only possible parent–child relationship that fits the given condition. This type of puzzle checks whether you carefully notice the gender implication in the word son and correctly infer the alternative.

Given Data / Assumptions:
- Arun is the father of B. - B is not the son of Arun. - Father means male parent of a child. - The options involve close relations such as daughter, grandson, granddaughter and others. - We assume usual, simple family structure with no adoption or unusual use of terms.

Concept / Approach:
If Arun is the father of B, then B must be Arun's child. For a parent–child relation with a male parent, the children are either sons (male children) or daughters (female children). The statement clearly denies that B is a son. Therefore, within the immediate-child category, only daughter remains. Grandson and granddaughter would require an extra generation in between, which is not mentioned here. So the approach is to interpret the given sentence literally and eliminate all options that contradict it.

Step-by-Step Solution:
Step 1: Note that father of B means Arun is B's male parent. Step 2: A male parent has two possible immediate-child relations: son (male child) or daughter (female child). Step 3: The question states that B is not the son of Arun, so B cannot be male. Step 4: Therefore, B must be a female child of Arun, that is, his daughter. Step 5: Grandson or granddaughter would require B to be one generation below Arun's child, which is not consistent with Arun being directly defined as father of B.

Verification / Alternative check:
Imagine a simple example: let Arun be a man with two children, one boy and one girl. The sentence Arun is father of B but B is not son of Arun could only be used for the girl. If B were the boy, B would be a son, contradicting the given condition. Thus, whenever you see father of B combined with not son, you can safely interpret B as daughter.

Why Other Options Are Wrong:
- Mother: B cannot be Arun's mother, because Arun is explicitly the father and therefore in the older generation. - Grandson and Granddaughter: These describe the children of B's child, which adds an extra generation. Here, Arun is stated to be directly the father of B, not the grandfather. - Sister: Arun cannot be the father of someone who is his sister; that would violate the basic generational structure.

Common Pitfalls:
Many learners overlook the phrase but B is not son of Arun and simply assume that every child of a father is a son, leading to confusion. Others misinterpret father and think of more distant relations like grandfather. The key is to read carefully, notice the gender word son, and then deliberately pick daughter as the only remaining direct-child relation.

Final Answer:
B is related to Arun as his daughter.