Choose the correct sequence of mathematical signs to replace the placeholders $\ast$ in order to balance the given equation:
$$(12\ast 7\ast 6)\ast 13\ast 6$$

Let's test the options step by step to balance the equation:
*Testing Option C ($\times ,-,÷,=$):**
Replacing symbols in order gives:

$$(12\times 7-6)÷13=6$$

Solve inside the brackets first using BODMAS:

$$12\times 7=84$$

$$84-6=78$$

Now substitute back into the equation:

$$78÷13=6$$

$$6=6$$

This matches the Right Hand Side perfectly. Thus, option C is correct.