MCQOPTIONS
 Saved Bookmarks
				| 1. | 
                                    __________ act as depressants to slow down the action of central nervous system. | 
                            
| A. | Barbiturates | 
| B. | Heroine | 
| C. | Cocaine | 
| D. | None of the above | 
| Answer» B. Heroine | |