সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
Which one of the following is responsible for the depletion of ozone layer?
Which one of the following is responsible for the depletion of ozone layer?
- ক. PAN
- খ. sulphur oxide
- গ. chloroflurocarbons
- ঘ. methane
সঠিক উত্তরঃ chloroflurocarbons
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Basic Information of Daily Science, Inventions and...