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বাই সাইকেলের জনক কে ?

Ferdows blog

প্রশ্নঃ বাই সাইকেলের জনক কে ?

ক. কার্ল ভ্যান ড্রেইস

খ. ওপেন হেমার

গ. মার্টিন বিঞ্জেরিনেক

ঘ. মার্টিন কুপার

উত্তরঃ কার্ল ভ্যান ড্রেইস ।

ব্যাখ্যাঃ বাই সাইকেলের জনক কার্ল ভ্যান ড্রেইস । ১৯৮৮ সালে আধুনিক বাই সাইকেলের সূচনা হয় ।

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