A) Morphine — IV) Pain killer: Correct. Morphine is a well-known opioid analgesic (pain reliever).
B) Cannabinoids — I) Cardio vascular system: Correct. Cannabinoids like THC can affect the cardiovascular system, causing increased heart rate and blood pressure.
C) Cocaine — V) Dopamine: Correct. Cocaine primarily affects the central nervous system by increasing dopamine levels.
D) Benzodiazepines — II) Tranquilizers: Correct. Benzodiazepines are sedative drugs used as tranquilizers for anxiety and sleep disorders.