সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
Which of the following is a main component of comon glass?
Which of the following is a main component of comon glass?
- ক. powdered mica
- খ. marble
- গ. water
- ঘ. sand
সঠিক উত্তরঃ sand
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Basic Information of Daily Science, Inventions and...