Explanation:

- Let's define the present ages:

- Let Ram's present age be $R$.

- Let Shyam's present age be $S$.

- Four years ago:

- Shyam's age was $S-4$.

- Ram's age was $R-4$.

- Equation: $S-4=\frac{3}{4}(R-4)$.

- Four years hence:

- Shyam's age will be $S+4$.

- Ram's age will be $R+4$.

- Equation: $S+4=\frac{5}{6}(R+4)$.

- Solve these two equations to find $S$.

- Solving gives $S=24$.

- Therefore, the correct present age of Shyam is:

- Option 1: 24 years

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