[amp_mcq option1=”5FU” option2=”15LS” option3=”9IT” option4=”17OR” correct=”option1″]
The answer is A. 5FU.
The series is a simple addition of 4 to the previous number, except for 5FU. The correct sequence should be 1CC, 5FU, 9IT, 13LU, 17OR.
1CC + 4 = 5FU
5FU + 4 = 9IT
9IT + 4 = 13LU
13LU + 4 = 17OR
Therefore, 5FU is the odd one out.