a$.16$ The time taken to construct a building was from April $1992$ to September $1993.$ In September $1996,$ the average settlement was found to be $5\mathrm{.}16cm.$ If the ultimate settlement is estimated to be $25cm,$ then the settlement in January $1997$ would have been

$($a$)6cm$

$($b$)7cm$

$($c$)8cm$

$($d$)9cm$

$[$ESE : $2015]$