Explanation:
The given series is X, XI, XH, XIII, ____.

To find the missing term, let's analyze the given terms:

- The first term is X, which represents the Roman numeral for 10.
- The second term is XI, which represents the Roman numeral for 11.
- The third term is XH, which is not a standard Roman numeral representation. However, we can assume that H represents the Roman numeral for 1,000, which is M. So XH can be interpreted as 10 + 1,000 = 1,010.
- The fourth term is XIII, which represents the Roman numeral for 13.

Pattern:
- The pattern in the first three terms is that the Roman numeral for 10 (X) is combined with another Roman numeral to form the number.
- In the first term, X is combined with nothing to form 10.
- In the second term, X is combined with I (1) to form 11.
- In the third term, X is combined with H (1,000) to form 1,010.

Applying the pattern:
- To continue the pattern, we need to find a Roman numeral that, when combined with X, will result in the next number in the series.
- The next number in the series is 13, so we need to find a Roman numeral that, when combined with X, will equal 13.

Finding the missing term:
- The Roman numeral for 13 is XIII.
- Since we are combining X with XIII to get the next number in the series, the missing term is XIV.

Therefore, the complete series is X, XI, XH, XIII, XIV. Hence, the correct answer is option B.