Sunflower act as an indicator plant to diagnose the deficiency of

A. Boron

B. Zinc

C. Nitrogen

D. Phosphorus

Answer: Option A

Solution(By Examveda Team)

Sunflowers act as an indicator plant to diagnose the deficiency of boron in the soil as definite boron deficiency symptoms are developed in sunflowers.
The young and middle leaves of the plants develop small chlorotic patches and develop orange-colored necrotic areas in the young leaves.