very funny PJ

Gulshan Grover is riding a bike at the speed of light. On the way he offers a lift to a stranger.

 Stranger: 'Sir, can I know your name please'
 Gulshan : 'I am Gulshan Grocer'
 Stranger : Grocer? Sure you dont mean Gulshan Grover??
 Gulshan: No it is Grocer.

  Now tell me why did Gulshan say so...








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  Further,,,









  ANS: Because at the speed of light V=C