A1 - Banjo
B2 - Triangle
C3 - Tambourine
D4 - Glass armonica
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Answer: Of Benjamin Franklin's many achievements, probably the least well-known are his accomplishments in music. In 1761, Franklin designed the glass armonica – the first musical instrument “born” in America. (Not to be confused with a mouth harmonica.) Frankin called it the armonica, based on the Italian word armonia, which means "harmony". This new instrument became very popular, and music written expressly for the glass armonica was composed by such legends as Mozart and Beethoven. The popularity of the instrument faded early in the nineteenth century, but it is still played occasionally today.
Also -
The only jointless bone in your body is the hyoid bone in your throat. The hyoid bone is not connected to the body by a joint. The hyoid bone is a horseshoe shaped bone situated in the anterior midline of the neck between the chin and the thyroid cartilage. At rest, it lies at the level of the base of the mandible in the front and the third cervical vertebra behind. It is the only bone in the human skeleton not articulated to any other bone. It is kept suspended in position by muscles and ligaments.
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