निम्नलिखित में किसका आविष्कार विलहेल्म रान्टजेन द्वारा किया गया? / Which of the following was invented by Wilhelm Roentgen?
Verified Answer
A. रेडियो / Radio
B. एक्स-रे मशीन / X-Ray Machine
C. बिजली का बल्ब / Electric Bulb
D. उपरोक्त में कोई नहीं / None of the above
Explanation:
Wilhelm Conrad Röntgen discovered X-rays in 1895, for which he received the first Nobel Prize in Physics.