In the following series, one number is missing as shown by the question mark (?) select the missing number from the given options.3, 8, 13, 18, ?

In the following series, one number is missing as shown by the questio

1.	In the following series, one number is missing as shown by the question mark (?) select the missing number from the given options.3, 8, 13, 18, ?
A.	24
B.	23
C.	21
D.	22
Answer» C. 21