Solve : $y' +\tan x.y =\tan x \quad y(\large\frac{\pi}{4})$$=1$

Question

$(a)\;y= e^{\sec ^2 x}\frac{\tan ^2x}{2}+c \\ (b)\;y= e^{\tan ^2 x/2}+c \\ (c)\;y= e^{\sec ^2 x}\frac{\tan ^2x}{4}+c \\ (d)\;y= e^{-\sec ^2 x}\frac{\tan ^2x}{2}+c$