Consider the following first order types of $Rx_n$ $x\;\; \underrightarrow {K_1}\;\;A+B,y\;\;\underrightarrow {K_2}\;\;C+D,z\;\;\underrightarrow{K_3}\;\; E+F$ if $50\%$ of $Rx_n$ y was completed when $7.5\%Rx_n$ of x and $87.5\%Rx_n$ of z completed then relation between $K_1,K_2$ & $K_3$

Question

$\begin{array}{1 1}(a)\;6K_1=3K_2=2K_3&(b)\;3K_1=6K_2=2K_3\\(c)\;6K_1=2K_2=3K_3&(d)\;3K_1=2K_2=6K_3\end{array}$