If, $+$ stands for division; $\times$ stands for addition; $-$ stands for multiplication; $÷$ stands for subtraction, which of the following equation is correct?

Let's convert the arithmetic signs in the options as specified:
* $+$ becomes $÷$
* $\times$ becomes $+$
* $-$ becomes $\times$
* $÷$ becomes $-$

Let us check Option D: $36-6+3\times 5÷3=74$
Substituting the coded signs gives the expression:

$$36\times 6÷3+5-3$$

Applying the BODMAS operational priority rule:

1. Division: $6÷3=2$

$$36\times 2+5-3$$

2. Multiplication: $36\times 2=72$

$$72+5-3$$

3. Addition and Subtraction: $77-3=74$

Since LHS matches RHS ($74=74$), Option D is the correct mathematical equation.