Which of following is incorrect?

Question

$\begin{array}{1 1}(a)\;The\;slope\;of \;graph\;between\;\log k\;vs\;1/t\; is \;\tan\theta=-\large\frac{E_a}{2.303R}\\(b)\;for\; second\; order\; reaction\; graph\; between\;\large\frac{a_0-a_t}{a_t}\;\normalsize vs\;t\;is\; straight\;line\;with\;slope\;k_{a_0}\\(c)\;The\;slope\;of\;straight\;line\;in\;graph\;of\;ln[A_t]\;vs\;t_0\;is\tan\theta=\large\frac{-kt}{2.303}\\(d)\;\text{for zero order reaction as reaction proceeds the subsequent half lives of reactant decreases}\end{array}$