JEE Main 2019 Physics question

The electric field in a region is given by , where E is in NC and x is in metres. The value of constants are A = 20 SI unit and B = 10 SI unit. If the potential at x = 1 is and that at x = −5 is , then is:

• (A)−520 V
• (B)180 VCorrect
• (C)−48 V
• (D)320 V