Which of the following substances is commonly abused by athletes to enhance muscle strength?
Anabolic steroids are commonly abused by athletes to enhance muscle strength and performance. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Structural Organisation in Animals and Frog, Topic: Tissues, skeletal and organ systems.