Explanation:

Identifying the Correct Answer
The question presents a series of four options followed by a question mark. The task is to determine which option should logically come next in the sequence. The series appears incomplete, hence requiring us to identify the missing element.

Analysis of the Options
a) This option is presented as blank, indicating that something is missing in the series and needs to be identified.
b) The series does not follow a specific pattern, making it difficult to predict the next element based on the given options.
c) Similarly, option c does not provide any clear indication of the missing element in the series.
d) Option d also does not offer any clues to solve the sequence.

Conclusion
Given that the series is incomplete and requires us to identify the missing element, the correct answer is option 'A' as it signifies the blank space in the sequence. This choice aligns with the need to determine the next logical element in the series, which is currently missing. Therefore, option 'A' best fits the context of the question.