In a certain code language:

X * Y means 'X is the mother of Y'

X / Y means 'X is the brother of Y'

Given the expression: M * N / O, how is M related to O?

The correct answer is M is the mother of O.

Step-by-step Explanation:

Let us break down the given coded relations step-by-step to determine how M is related to O in the expression M * N / O.

1. Decode M * N:
According to the problem statement, "X * Y means X is the mother of Y".
Therefore, M * N means M is the mother of N.

2. Decode N / O:
According to the problem statement, "X / Y means X is the brother of Y".
Therefore, N / O means N is the brother of O.

3. Combine the relations:
- M is the mother of N.
- N is the brother of O (which means N and O are siblings sharing the same parents).
Since M is the mother of N, and O is N's sibling, M must also be the mother of O.

Hence, M is the mother of O.