This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
WHO Ladder is for the rationale titration of - 
Select and explain. 
A. Oral analgesia, B. Chemotherapy, C. Radiotherapy, D. Antidepressants
A: Oral analgesia
Answer: A: Oral analgesia 
Explanation: WHO Ladder is for the rationale titration of oral analgesia used in cancer paitents to relive their pain around the clock in more effective ways . Ref image - Researchgate.net