Consider the following statements and select the option that correctly fills in the blank.(I) In spring season,cambium is _A_active and produces _B_wood.(II) In autumn season,cambium is _C_active and produces _D_wood.

Vascular cambium is more active in spring season and the wood formed is called early wood or spring wood. In autumn season it is less active and the secondary xylem formed is called late wood or autumn wood. Spring wood and autumn wood formed in a year together called as annual ring or growth ring.