Step 1: Understanding the Concept:
Asexual propagation methods ensure that the daughter plants remain true to the parent type, which is critical in commercial floriculture.
Step 3: Detailed Explanation:
Technically, Gladiolus is propagated through Corms. A corm is a modified, swollen underground stem base. However, in general terminology used in many question papers (including this one), "Corms" are often grouped under the broader category of "Bulbs" or "Bulbous plants." Among the given choices, "Bulbs" is the most appropriate practical category.
Step 4: Final Answer:
Gladiolus is commercially propagated using corms (referred to as Bulbs in the options).