Secondary xylem and Phloem in dicot stem are produced by A. Apical meristem B. Vascular cambium C. Axillary meristems D. Phellogen
Option B Secondary vascular tissues, i.e, secondary xylem and pholem are formed by the vascular cambium. It is produced by two types of meristems, fascicular or intrafascicular and interfescicular cambium.
