The correct answer is (d) Infinite
Easy explanation: To find the solution, we can select arbitrary value of either x or y and we will get the appropriate value of the other variable.
Suppose we take value of x=0, then we get 2(0) + 4y=12
y=12/4
Therefore, y=4
Now, for x = 1, we get 2(1) + 4y = 12
4y=12-2=10
Therefore, y = 10/4
y = 2.5
Likewise, we can get infinite solutions by taking arbitrary values of either x or y.