The mercury column of height $\;0.8\;gm\;$ at $\;0^{0}C\;$ balances the mercury column of height $\;0.8144\;m\;$ at $\;100^{0}C\;$ . Calculate the coefficient of real expansion of mercury ?

Question

$(a)\;0.0018/^{0}C\qquad(b)\;0.00018/^{0}C\qquad(c)\;0.018/^{0}C\qquad(d)\;0.0016/^{0}C$