Gladiolus is propagated by -

Correct option is B

· Correct answer: (b) Corm
· Gladiolus is propagated by corms, which are swollen underground stems used for vegetative reproduction.
Other options:
· (a) Bulb: Not used for propagating gladiolus.
· (c) Rhizome: Rhizomes are used for propagating plants like ginger, not gladiolus.
· (d) Tuber: Tubers are used in plants like potatoes, not gladiolus.