How many times the keys of a writer have to be pressed in order to write first 50 counting no's?	Options.
A) 90 B) 91 C) 92 D) 93 E) 94
1 to 9 = 9 * 1= 
<gadget id="calculator">9 * 1</gadget>
<output>9</output>
9   10 to 50= 41 * 2 = 84   -----------   93   93
<result>D</result>
How many times the keys of a writer have to be pressed in order to write first 50 counting no's?