সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
Marble is a changed form of which of the following?
Marble is a changed form of which of the following?
- ক. limestone
- খ. basalt
- গ. graphite
- ঘ. coal
সঠিক উত্তরঃ limestone
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Basic Information of Daily Science, Inventions and...