12, 34, 10, 11, 12, 5, 6 ,7, 13, 14, ?, ?
Logically, what two numbers should replace the question marks? Choose the correct choice.
A) 13 and 11  B) 15 and 11  C) 19 and 11  D) 18 and 11  E) 17 and 11
B   15 and 11   1 + 2 + 3 + 4= 
<gadget id="calculator">1 + 2 + 3 + 4</gadget>
<output>10</output>
10, then insert next two numbers 11, 12 and add digits   1 + 1 + 1 + 2= 
<gadget id="calculator">1 + 1 + 1 + 2</gadget>
<output>5</output>
5.   Insert next two numbers 6, 7 and add digits  6 + 7= 
<gadget id="calculator"> 6 + 7</gadget>
<output>13</output>
13. Insert next two numbers 14, 15 and add digits   1 + 4 + 1 + 5= 
<gadget id="calculator">1 + 4 + 1 + 5</gadget>
<output>11</output>
11.
<result>B</result>
12, 34, 10, 11, 12, 5, 6 ,7, 13, 14, ?, ?
Logically, what two numbers should replace the question marks?