correct answer is: d) 75\;:\;74\;:\;72

Explanation

We know, 1 year = 12 months.
Here,
Ram’s age is 12 years 6 months or \left(12\times12\right)+6=150 months.
Shyam’s age is 12 years 4 months or \left(12\times12\right)+4=148 months.
Jadu’s age is 12 years or \left(12\times12\right)=144 months.
Now, the ratio of their age is :
150 months : 148 months : 144 months
\rightarrow 75\;:\;74\;:\;72
Ans: The ratio of their months is 75\;:\;74\;:\;72\;.

Another form of this specific math question exists:

1. If Ram is aged 12 years 6 months, Shyam is aged 12 years 4 months and Jadu is aged 12 years, what is the ratio of their ages?
2. Given that Ram is 12 years 6 months old, Shyam is 12 years 4 months old and Jadu is 12 years old, what is the ratio of their ages?
3. Find the ratio of the ages of Ram 12 years 6 months, Shyam 12 years 4 months, and Jadu 12 years.