To solve this question, we can set up a system of equations. Let's assume that the number of correct answers is x.
According to the given conditions:
- A correct answer scores 4 marks
- A wrong answer scores -2 marks
We can set up the equation to find the total score:
4x - 2(150 - x) = 480
Simplifying the equation:
4x - 300 + 2x = 480
6x - 300 = 480
6x = 780
x = 130
Therefore, the number of correct answers is 130.
So, the correct answer is option B) 130.