সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
Which one of the following is not a noble gas?
Which one of the following is not a noble gas?
- ক. argon
- খ. krypton
- গ. hydrogen
- ঘ. helium
সঠিক উত্তরঃ hydrogen
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Basic Information of Daily Science, Inventions and...