To solve this question, we need to think beyond letter series. Let's analyze the given series:
C D I L M V ?
If we observe the given series closely, we can see that it follows the pattern of Roman numerals. The series starts with "C" which represents the Roman numeral for 100, followed by "D" which represents 500. Then, we have "I" which represents 1, "L" represents 50, "M" represents 1000, and finally, "V" represents 5.
The pattern in the series is that each subsequent element represents a decreasing value in Roman numerals. Therefore, the next element in the series should represent the Roman numeral for a value less than 5.
Let's go through each option to determine the correct answer:
Option A) Z - This option is incorrect because "Z" does not represent a Roman numeral value less than 5.
Option B) X - This option is correct because "X" represents the Roman numeral for 10, which is less than 5.
Option C) W - This option is incorrect because "W" does not represent a Roman numeral value less than 5.
Option D) A - This option is incorrect because "A" does not represent a Roman numeral value.
Therefore, the correct answer is option B) X.