A student performs an experiment for determination of $g = \frac{{4{\pi ^2}l}}{{{T^2}}}$ and he commits an error of ∆l. For that he takes the time of n oscillations with the stop watch of least count $\Delta $T and he commits a human error of 0.1 sec. For which of the following data, the measurement of g will be most accurate $\Delta l\,\,\Delta T\,\,n\,\,Ampli.of\,oscill$