Answer:
Let's use the information provided to solve for Li Zhu's age.
1. We know that Muthu is 26 years old.
2. It's given that Muthu is 5 years younger than Siew Kim, so Siew Kim is 26 + 5 = 31 years old.
3. Siew Kim is 12 years older than Li Zhu, so to find Li Zhu's age, we subtract 12 from Siew Kim's age:
Li Zhu's age = Siew Kim's age - 12
Li Zhu's age = 31 - 12
Li Zhu's age = 19 years old
So, Li Zhu is 19 years old. None of the provided options (a, b, c, d) match this age, so there seems to be an error in the given answer choices.
Explanation: