Question

Choose the correct answer from the alternatives given.
Heart rot of beet root is caused by the deficiency of:

• A. B
• B. Fe
• C. Mg
• D. Zn

Answer 1

The correct option is A B

Heart rot in beet root is a deficiency in the minor, nonmobile element Boron, $B$. It shows necrotic cross-hatching inside the leaf petiole. Young leaves turn brown and die, resulting in a rosette of small dead leaves at the top of the beet. In the fleshy root, internal and external black spots of necrotic tissue develop.

So the correct answer is "$B$".