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Sit $16.$ Two storey frame with horizontal loads. Flexural, axial deformation of beams and columns are negligible. If lateral drift at $A$ is ${}_1$ and $B$ is ${}_2,$ the correct $\frac{{}_1}{{}_2}.$

$($a$)1\mathrm{.}3825$

$($b$)1\mathrm{.}6875$

$($c$)2\mathrm{.}5313$

$($d$)5\mathrm{.}0625$