সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
Who among following invented the steam engine?
Who among following invented the steam engine?
- ক. Thomas Savery
- খ. Wright Brothers
- গ. Marconi
- ঘ. James Watt
সঠিক উত্তরঃ James Watt
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Basic Information of Daily Science, Inventions and...