A student performs an experiment for determination of $ g \bigg( \large\frac{4 \pi ^2l}{T^2}\bigg) $$, l \approx 1m$ , and he commits an error of $ \Delta l$. For T, he takes the time of n oscillations with the stop watch of least count $ \Delta T$ and he commits a human error of 0.1s. For which of the following data, the measurement of g will be most accurate?

Question

	$ \Delta l$	$ \Delta T$	n	Amplitude of oscillation
(A)	5 mm	0.2 s	10	5 mm
(B)	5 mm	0.2 s	20	5 mm
(C)	5 mm	0.1 s	20	1 mm
(D)	1 mm	0.1 s	50	1 mm