The condition where first formed xylem element faces the pericycle is called A and it is seen in B , find the A and B
A - Exarch ; B - Root.
A - Endarch ; B - Root.
A - Exarch ; B - Stem.
A - Mesarch ; B - Root.
In roots protoxylem is faced towards pericycle and metaxylem faced towards pith or medulla so xylem in roots is exarch