Complete the series 20, 19, 17, ...., 10, 5 Select the correct option.
A) 2 B) 3 C) 5 D) 7 E) 9
20 - 1= 
<gadget id="calculator">20 - 1</gadget>
<output>19</output>
19   19 - 2= 
<gadget id="calculator">19 - 2</gadget>
<output>17</output>
17   17 - 3= 
<gadget id="calculator">17 - 3</gadget>
<output>14</output>
14   14 - 4= 
<gadget id="calculator">14 - 4</gadget>
<output>10</output>
10   10 - 5= 
<gadget id="calculator">10 - 5</gadget>
<output>5</output>
5   Answer is 5.
<result>C</result>
Complete the series 20, 19, 17, ...., 10, 5