Rate of reaction can be expressed by Arrhenius equation as $k=Ae^{\large\frac{-E_a}{RT}}$.Select the correct statement

Question

$\begin{array}{1 1}(a)\;k\;is\;equation\;constant\\(b)\;A\;is\;absorbtion\;factor\\(c)\;R\;is\;Rydberg's\;constant\\(d)\;E\;represents\;energy\;of\;activation\end{array}$