Answer
Current through different elements connected in series has same magnitude and direction.
Work Step by Step
Let's assume A,B elements are series-connected in a circuit and currents through them are flowing in the same direction and are $i_{a}$,$i_{b}$ respectively. The point joining them is a node by definition. By applying KCL,
$i_{a}$ + (-$i_{b}$) = 0
$i_{a}$ = $i_{b}$
Hence current has same direction and magnitude.
