MCQOPTIONS
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				| 1. | 
                                    Which one of the following is correct? Lightning is formed, when [NDA] | 
                            
| A. | similar charges of electricity rush towards each other and then get repelled | 
| B. | clouds strike against impurities in air and the friction bums up these impurities | 
| C. | strong opposite charges in different clouds break down the resistance offered by intervening air | 
| D. | water vapour produces electricity in the clouds | 
| Answer» D. water vapour produces electricity in the clouds | |