Answer:
Option B is correct.
Step-by-step explanation:
Given the charge, Q = 12uC
Now convert the uC into C = 5*10^-6 C
Given, d = 0.020 m
Now use the below formula:
E = K*Q/d^2
Now insert all the values in the above formula and then solve.
E = (9 ×10^9) × (12×10^-6) / (0.020)^2
E = 2.7 ×10^8 N/C
Therefore option B is correct.