সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
Which of the following is necessary for a substance to burn?
Which of the following is necessary for a substance to burn?
- ক. gasoline
- খ. hydrogen
- গ. oxygen
- ঘ. light
সঠিক উত্তরঃ oxygen
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Basic Information of Daily Science, Inventions and...