Find the missing number in the given sequence : 1,5,9,13,?,21,25,?
Pick:  A) 14 & 26  B) 15 & 27  C) 16 & 28  D) 17 & 29  E) 15 & 30
1+4= 
<gadget id="calculator">1+4</gadget>
<output>5</output>
5   5+4= 
<gadget id="calculator">5+4</gadget>
<output>9</output>
9   9+4= 
<gadget id="calculator">9+4</gadget>
<output>13</output>
13   13+4= 
<gadget id="calculator">13+4</gadget>
<output>17</output>
17   17+4= 
<gadget id="calculator">17+4</gadget>
<output>21</output>
21   21+4= 
<gadget id="calculator">21+4</gadget>
<output>25</output>
25   25+4= 
<gadget id="calculator">25+4</gadget>
<output>29</output>
29   ANSWER:17 &amp; 29
<result>D</result>
Find the missing number in the given sequence : 1,5,9,13,?,21,25,?