In an experiment for determining the gravitational acceleration g of a place with the help of a simple pendulum , The measured time period square is plotted against the string length of the pendulum in the figure ? What is the value of g at the place ?

Question

$(a)\;9.81\;m/s^{2} \qquad(b)\;9.87\;m/s^{2} \qquad(c)\;9.91\;m/s^{2} \qquad(d)\;10.0\;m/s^{2}$