Ncert Exercises & Solutions

The correct statement among the following is:

1.	Some tranquilizers function by inhibiting the enzymes which catalyze the degradation of noradrenaline.
2.	Tranquilizers are narcotic drugs.
3.	Tranquilizers are chemical compounds that do not affect the message transfer from nerve to receptor.
4.	Tranquilizers are chemical compounds that can relieve pain and fever.