 
			 
			MCQOPTIONS
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				| 1. | Electromagnetic spectrum contains : | 
| A. | gamma rays (wave length < 10^-10 m) | 
| B. | ultraviolet rays (wave length < 10^-6 m) | 
| C. | infrared rays (wave length < 10^-4 m) | 
| D. | All of these | 
| Answer» E. | |