☰
GkSeries.com

SSC CGL 2017 Tier 1 Questions and Answers

Question

Who invented first working laser?

[A] A. H. Taylor
[B] W. K. Roentgen
[C] T. H. Maiman
[D] Fred Morrission
Answer & Explanation

Answer: [T. H. Maiman ]
Click Here to Read more questions apsc enforcement inspector test series