 
			 
			MCQOPTIONS
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				| 1. | Choose the correct alternative to complete the given analogy. Change in period in a school: Periodic change::________: Non periodic change | 
| A. | Heart beating | 
| B. | Formation of day and night | 
| C. | Concave mirror | 
| D. | Change in phases of moon | 
| Answer» D. Change in phases of moon | |