`int_0^(pi^2//4)(sinsqrt(x))/(sqrt(x))dx` equals
a. `pi^2//8`
b. `pi//4`
c. `2`
d. `1`

Explanation

To solve the integral \( I = \int_0^{\frac{\pi^2}{4}} \frac{\sin(\sqrt{x})}{\sqrt{x}} \, dx \), we will use a substitution method.

### Step 1: Substitution
Let \( t = \sqrt{x} \). Then, we have:
\[ x = t^2 \quad \text{and} \quad dx = 2t \, dt \]

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