What is the main active ingredient of marijuana?

What are the most commonly abused substances among the youth?
$(i)$ Drugs $(ii)$ Alcohol $(iii)$ Soft drinks $(iv)$ Toddy

Fatty liver syndrome appears due to

Morphine is a drug that:

Morphine is known to: $(i)$ Induce a feeling of euphoria. $(ii)$ Relieve anxiety,fear,and tension. $(iii)$ Suppress appetite. $(iv)$ Act on neurons in the central nervous system to relieve pain and induce sedation. $(v)$ Stimulate urine production. Which of the following statements are correct?

With which receptors do opioids bind?