Đáp án:

\( \Delta_1 \) qua \( M(0, -2, 0) \), \( \overrightarrow{u_{\Delta_1}} = (2, 3, 4) \).  

\( \Delta_2 \) qua \( N(1, 2, 1) \), \( \overrightarrow{u_{\Delta_2}} = (1, 1, 2) \).  

\( \left[\overrightarrow{u_{\Delta_1}}, \overrightarrow{u_{\Delta_2}}\right] \cdot \overrightarrow{MN} = (2, 0, -1) \cdot (1, 4, 1) = 2 - 1 \neq 0. \)  

\( \Rightarrow \Delta_1 \text{ chéo } \Delta_2 \Rightarrow \boxed{C}\)