Assertion (A) : According to EAN rule, ferricyanide is not a stable complex compound.
Reason (R) : EAN of Fe in ferricyanide is 35.
Annual rings are the number of : (a) Internodes in a stem (b) Rings of vascular bundles in a monocot stem. (c) Barks layers in a woody stem. (d) Layers of Xylem in a stem.