What happens to primary phloem in stem after sec growth

What happens to primary phloem in stem after secondary growth? (a) Compresses outside and degenerates (b) Compresses inside and degenerates (c) Becomes part of secondary phloem (d) Modifies in sclerenchyma

What happens to primary phloem in secondary growth in dicot root?

primary stem is

primary stem is

What happens to the primary xylem and phloem during secondary growth ?

What happens to primary xylem and primary phloem during secondary growth?

What happens to primary xylem and primary phloem during secondary growth?

What happens to primary xylem and primary phloem during secondary growth?

What happens to primary xylem and primary phloem during secondary growth?