The period of oscillation of a simple pendulum is given by T=2πlg where l is about 100 cm and is known to have 1mm accuracy. The period is about 2s. The time of 100 oscillations is measured by a stop watch of least count 0.1 s. The percentage error in g is

(1) 0.1%

(2) 1%

(3) 0.2%

(4) 0.8%

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