The smallest number that is divisible by 2, 4, and 6 is ____.

The correct option is B 12
The smallest number that is divisible by 2, 4, and 6 can be determined by finding the lowest common multiple of these numbers.

$\begin{array}{cc}2& 2,4,6\\ 2& 1,2,3\\ 3& 1,1,3\\ & 1,1,1\end{array}$
LCM = 2 × 2 × 3
= 12

The required number is 12.