The diagram shows a cross-section through a leaf. What structures are K, L, M and N?
- AK: cuticle, L: phloem, M: xylem, N: spongy mesophyll
- BK: cuticle, L: xylem, M: phloem, N: spongy mesophyll
- CK: xylem, L: phloem, M: spongy mesophyll, N: cuticle
- DK: xylem, L: spongy mesophyll, M: cuticle, N: phloem