A. xylem is a complex tissue concerned in the transport of water and minerals.
B. phloem is complex tissue concerned in the translocation of organic solutes or food.
C. companion cells are specialized parenchyma cells present in the phloem, regulate the flow of nutrients through the sieve tube.
D. tracheids are the dead cells with lignified walls and wide lumen present in the xylem, functions as a channel for transport of water and minerals.
So the correct answer is ‘A-3 B-4 C-1 D-2’.