R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Science Q. In which decade was the telephone invented? (A) 1850s (B) 1870s (C) 1880s (D) 1860s 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (B) 1870s You must be Logged in to update hint/solution 💬 Discussion 💬 Comment