Concept:The first calculator, also known as the Pascaline or Arithmetic Machine, was a mechanical adding device invented by Blaise Pascal.
Explanation:The Pascaline is regarded as one of the first calculators or adding machines in history.
It was the first adding machine to be produced in any quantity and actually put into use.
This device was designed and built by the French mathematician-philosopher Blaise Pascal.
He created it between 1642 and 1644.
The Pascaline used a series of geared wheels to perform addition and subtraction mechanically.
It represented a major step toward modern calculating machines.
Among the given options, the person who built the first calculator is Blaise Pascal.
Answer:Option B: Blaise Pascal