JEE Main Physics question

The length of a simple pendulum is about 100 cm known to an accuracy of 1 mm. Its period of oscillation is 2 s determined by measuring the time for 100 oscillations using a clock of 0.1 s resolution. What is the accuracy in the determined value of ?

• (A)0.2%Correct
• (B)0.5%
• (C)0.1%
• (D)2%