JEE Main 2021 Physics question

The time period of a simple pendulum is given by T = . The measured value of the length of pendulum is 10 cm known to a 1 mm accuracy. The time for 200 oscillations of the pendulum is found to be 100 second using a clock of 1s resolution. The percentage accuracy in the determination of 'g' using this pendulum is 'x'. The value of 'x' to the nearest integer is :

• (A)2%
• (B)3%Correct
• (C)5%
• (D)4%