Inventor of Bluetooth is _________.

Correct option is D

Correct Answer Option (d): Jaap Haartsen
Explanation:
The inventor of Bluetooth is Jaap Haartsen, a Dutch engineer who developed the technology while working for Ericsson in 1994.

Bluetooth is a wireless communication standard that enables devices to exchange data over short distances using radio waves.

Jaap Haartsen's innovation laid the foundation for the widely used technology in devices like smartphones, headphones, and laptops.

Explanation of Other Options:

•  Charles Simonyi:
  Charles Simonyi is a Hungarian-American computer scientist who developed Microsoft Word and Microsoft Excel while working at Microsoft.
•  Bill Gates:
  Bill Gates is the co-founder of Microsoft and a key figure in the development of personal computing through the Windows operating system.
  
•  Paul Allen:
  Paul Allen, another co-founder of Microsoft, played a significant role in the early development of software and technology.
  His contributions were primarily in partnership with Bill Gates in establishing Microsoft.
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