In the following question, select the number which can be placed at the sign of questionmark (?) from the given alternatives.9 11 7 2417 6 4 2412 12 0 ?

In the following question, select the number which can be placed at th

1.	In the following question, select the number which can be placed at the sign of questionmark (?) from the given alternatives.9 11 7 2417 6 4 2412 12 0 ?
A.	24
B.	21
C.	27
D.	23
Answer» C. 27