The diagrams illustrate three kinds of neurones. Which sequence indicates the route along which impulses move in a reflex action?
- A$\text{L} \rightarrow \text{M} \rightarrow \text{N}$
- B$\text{M} \rightarrow \text{L} \rightarrow \text{N}$
- C$\text{M} \rightarrow \text{N} \rightarrow \text{L}$
- D$\text{N} \rightarrow \text{M} \rightarrow \text{L}$