If Mani is taller than Tony but shorter than Deepak and Tony is just as tall as Mohan but taller than Gokul, then Mohan is:

Let's establish the height relations using inequalities based on the given statements:
1. "Mani is taller than Tony but shorter than Deepak":

$$\text{Deepak}>\text{Mani}>\text{Tony}$$

2. "Tony is just as tall as Mohan but taller than Gokul":

$$\text{Tony}=\text{Mohan}>\text{Gokul}$$

Combining both relations together:

$$\text{Deepak}>\text{Mani}>\text{Tony}=\text{Mohan}>\text{Gokul}$$

Now, let's analyze the position of Mohan:

* Since $\text{Mani}>\text{Tony}$ and $\text{Tony}=\text{Mohan}$, it directly follows that $\text{Mani}>\text{Mohan}$ (Mohan is shorter than Mani).

This matches option $\text{C}$.