MCQOPTIONS
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				| 1. | 
                                    Name the ionization layer that exists during day time and usually vanishes at night due to highest recombination rate | 
                            
| A. | Appleton region | 
| B. | D Region | 
| C. | Normal E region | 
| D. | Sporadic E region | 
| Answer» C. Normal E region | |