Annual rings are the bands of

Options

A. Secondary cortex and cork
B. Secondary vascular tissues
C. Secondary xylem and medullary rays
D. Secondary phloem and medullary rays

Answer

B

Explanation

Spring wood + Autumn wood of a year constitute annual ring. Spring and Autumn wood is the part of seondary xylem formed during spring and autumn. The amount of wood is affected by the activity of cambium.