সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
Which of the following is not a constituent of the atmosphere?
Which of the following is not a constituent of the atmosphere?
- ক. nitrogen
- খ. carbon dioxide
- গ. aluminium
- ঘ. oxygen
সঠিক উত্তরঃ aluminium
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Basic Information of Daily Science, Inventions and...