Tip hooking-a disorder in cauliflower due to the deficiency of . . . . . . . . mineral.

Answer: Option A

Tip hooking-a disorder in cauliflower due to the deficiency of calcium minerals.
Symptoms of calcium deficiency start on younger leaves. They develop necrotic lesions on leaf tips and margins (Tip-burn). With ongoing calcium deficiency necrotic areas and chlorotic border progress from tips and margins inwards. Affected leaves are deformed and abraded.