This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pharmacology, Subject name: Pharmacology
The ratio of the dose that produces toxicity to the dose that produces a clinically desired or effective response in a population of individual is known as:DELETE REPEAT 
Select and explain. 
A. Efficacy, B. Potency, C. Therapeutic index, D. Paial agonist
C: Therapeutic index
Answer: C: Therapeutic index 
Explanation: ref ; KD Tripathi pharmacology 7th edition (page no; 55) The gap between the therapeutic effect DRC (Dose Response Curve) and the adverse effect DRC defines the safety margin or the therapeutic index of a drug. Therapeutic index =median lethal dose /median effective dose or LD 50/ ED 50