Q. In which decade was the telegraph invented?

  • (A) 1810s
  • (B) 1890s
  • (C) 1870s
  • (D) 1840s
✅ Correct Answer: (D) 1840s

Published by Ram Sharma ⭐ 193.88K Points at 27-Dec-2021 04:37 pm in Physics

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