Some vascular bundles are described as open because these

Options

(a) are surrounded by pericycle but not endodermis
(b) are capable of producing secondary xylem and phloem
(c) possess conjunctive tissue between xylem and phloem
(d) are not surrounded by pericycle

Correct Answer:

are capable of producing secondary xylem and phloem

Explanation:

Open means presence of cambium during secondary growth. Vascular cambium divides to form secondary xylem towards inner side while secondary phloem towards outside