Answer: 6
Explanation:
In any algebraic expression a term could be a variable(a,b,c,...), or a constant (numerical value) or a product of variables and a constant.
For example : In expression
, there are 4 terms :

Let's take one more example :
In this expression there are only 3 terms , that are
The given expression :

There are total 6 variable terms , that are :

Hence, the correct answer is : 6