Blood RelationsPYQ May 25Question 4357 of 195
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Study the following information carefully: A3P means A is the mother of P. A4P means A is the brother of P. A9P means A is the husband of P. A5P means A is the daughter of P. Which of the following means that K is the mother-in-law of M?

Options

AM9N3K4J
BM9N5K3J
CK5J9M3N
DK3J9N4M
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Correct Answer

✅ Option b — M9N5K3J

All Options:

  • AM9N3K4J
  • BM9N5K3J
  • CK5J9M3N
  • DK3J9N4M

Detailed Solution & Explanation

Let us first write down the meanings of the codes:
- A3P\displaystyle A3P: A\displaystyle A is the mother of P\displaystyle P.
- A4P\displaystyle A4P: A\displaystyle A is the brother of P\displaystyle P.
- A9P\displaystyle A9P: A\displaystyle A is the husband of P\displaystyle P.
- A5P\displaystyle A5P: A\displaystyle A is the daughter of P\displaystyle P.

We need to find the expression that means "K\displaystyle K is the mother-in-law of M\displaystyle M". For K\displaystyle K to be the mother-in-law of M\displaystyle M, K\displaystyle K must be female (a mother) and M\displaystyle M must be married to K\displaystyle K's child.

Let us analyze Option b: M9N5K3J\displaystyle M9N5K3J step-by-step:
1. **Decode M9N\displaystyle M9N**:
Since A9P\displaystyle A9P means A\displaystyle A is the husband of P\displaystyle P, M9N\displaystyle M9N means M\displaystyle M is the husband of N\displaystyle N. This implies:
- M\displaystyle M is male and N\displaystyle N is female.
- M\displaystyle M and N\displaystyle N are a married couple.

2. **Decode N5K\displaystyle N5K**:
Since A5P\displaystyle A5P means A\displaystyle A is the daughter of P\displaystyle P, N5K\displaystyle N5K means N\displaystyle N is the daughter of K\displaystyle K. This implies:
- K\displaystyle K is the parent of N\displaystyle N.

3. **Decode K3J\displaystyle K3J**:
Since A3P\displaystyle A3P means A\displaystyle A is the mother of P\displaystyle P, K3J\displaystyle K3J means K\displaystyle K is the mother of J\displaystyle J. This implies:
- K\displaystyle K is female.

Combining these relations:
- Since K\displaystyle K is female and N\displaystyle N is the daughter of K\displaystyle K, K\displaystyle K is the mother of N\displaystyle N.
- Since M\displaystyle M is the husband of N\displaystyle N, the mother of N\displaystyle N (K\displaystyle K) is the mother-in-law of M\displaystyle M.

Thus, M9N5K3J\displaystyle M9N5K3J correctly represents "K\displaystyle K is the mother-in-law of M\displaystyle M".

Hence, **Option B** is the correct answer.

About This Chapter: Blood Relations

Paper

Paper 3: Quantitative Aptitude

Weightage

5 Marks

Key Topics

Blood Relations

This chapter covers Blood Relations and is part of Paper 3: Quantitative Aptitude in the CA Foundation exam.

View Official ICAI Syllabus

Exam Strategy Tip

This topic carries 5 Marks weightage. Focus on understanding core concepts rather than memorizing.

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