Answer:
The correct option is A.
Step-by-step explanation:
If the degree and variables of two terms are same, then they are called like terms.
In option A.
The given expression is
[tex]12b^2+4ab-3ba-6[/tex]
Here, 4ab and -3ab are like terms because both have same variables a and b with degree 1.
By combining like terms we get
[tex]12b^2+(4ab-3ab)-6[/tex]
[tex]12b^2+ab-6[/tex]
In options B, C and D, there are no like terms, So only the expression [tex]12b^2+4ab-3ba-6[/tex] we can simplify by combining like terms.
Therefore the correct option is A.
