Discover a wealth of knowledge at Westonci.ca, where experts provide answers to your most pressing questions. Get accurate and detailed answers to your questions from a dedicated community of experts on our Q&A platform. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.

The therapeutic index is defined as the ratio of:
A. Potency to efficacy.
B. LD50 to ED50.
C. Efficacy to potency.
D. ED50 to LD50.