Question

subhash is the leader ----our class (of/in)

Answer 1

$\textbf{\large{Answer -}}$

Subhash is the leader $\textbf{\underline{of}}$ our class.

Here we use the option of.

Since, a leader belongs to a certain place or unit therefore, we will use of.

Answer 2

The right option will be of. Subhash is the leader of our class.

A leader is the one who belongs to a certain place.

Therefore, the right option will be of. He leads the class.

So, you can fill the right option by choosing the of.

It will make the sentence completely correct.

Here in is the incorrect option.

So do not write it.