Which letter will replace the question mark () in the following letter series C, W, E, U, , S?

Option 1 : G

For this question, we use the table given below:

[ alt="Positional value Table" src="//storage.googleapis.com/tb-img/production/22/04/Positional%20value_Table.png" style="width: 490px; height: 103px;">

The logic followed here is:

LOGIC: Letters are alternatively increase and decrease by +2 and -2.

[ alt="F1 Madhuri Railways 23.05.2022 D33" src="//storage.googleapis.com/tb-img/production/22/05/F1_Madhuri_Railways_23.05.2022_D33.png" style="width: 214px; height: 117px;">

Here, the missing letter is "G".

Hence, the correct answer is "G".