Who invented Ball-Point Pen?
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Dr. Alan M. Turing
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John J. Loud
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Otto
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Roger Bacon
B
Correct answer
Explanation
John J. Loud patented the first ballpoint pen in 1888 for marking on leather. While Laszlo Biro later improved it into the modern commercial ballpoint pen in the 1930s, Loud was the original inventor. Alan Turing invented theoretical computing, Roger Bacon was a medieval philosopher, and Otto is not a complete name.