MCQOPTIONS
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				| 1. | 
                                    Disinfection of the rooms can be done by using_______________? | 
                            
| A. | 20% phenol | 
| B. | High efficiency particle arrestors | 
| C. | 40% formaldehyde vapour | 
| D. | Chlorine gas | 
| Answer» D. Chlorine gas | |