MCQOPTIONS
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| 1. |
When did U.S. Patent Office issue patent for telephone Alexander Graham Bell? |
| A. | 19 April 1848 |
| B. | 7 March 1876 |
| C. | 28 August 1862 |
| D. | 3 November 1872 |
| Answer» C. 28 August 1862 | |