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				| 1. | What is the difference between a CFL and an LED LAMP ?1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material.2. The average life span of a CFL is much longer than of an LED lamp.3. A CFL is LESS energy-efficient as compared to an LED lamp.Which of the statements given above is / are correct ? | 
| A. | 1 only | 
| B. | 2 and 3 | 
| C. | 1 and 3 | 
| D. | 1, 2 and 3 | 
| Answer» D. 1, 2 and 3 | |