সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন
Which one of the completed the 100th anniversary of its discovery in 1995?
Which one of the completed the 100th anniversary of its discovery in 1995?
- ক. X-rays
- খ. diesel engine
- গ. detergents
- ঘ. photography
সঠিক উত্তরঃ X-rays
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Basic Information of Daily Science, Inventions and...