Step 1: Concept
Vinblastine is a Vinca alkaloid obtained from the Catharanthus roseus plant.
Step 2: Meaning
It acts as an antineoplastic (anticancer) agent by inhibiting microtubule formation during cell division.
Step 3: Analysis
Vinblastine is a primary chemotherapy agent used to treat various cancers. While other options are neurological disorders, Hodgkin's Disease is a type of lymphoma (cancer of the lymphatic system).
Step 4: Conclusion
Therefore, Vinblastine is specifically used for treating Hodgkin's Disease.
Final Answer: (A)