<u>Answer:</u>
Option: A. The given equation is a linear expression
<u>Solution:
</u>
The linear expression is the expression whose highest degree is 1 after combining the degrees of all the terms in the expression.
Here in the problem the expression is
+ 2 which can also be written as, 
We can see that the degree of term
is 1 and the degree of term 2 is also 1
So, the highest degree of the given expression is =1
Hence, the equation is a linear expression.