The correct answer to this question is option 'A'. Let's break down the answer and explain it in detail:

1. Understanding the question:
The question is asking for the correct option out of four options, labeled as 'a', 'b', 'c', and 'd'. We need to analyze each option and determine the correct one.

2. Analyzing option 'A':
Option 'A' is stated as the correct answer. To confirm its accuracy, we need to evaluate the given information or context associated with the question.

3. Evaluating other options:
We should also briefly analyze the remaining options 'B', 'C', and 'D' to determine if they can be eliminated based on their relevance to the question.

4. Comparing the options:
By comparing option 'A' with the other options, we can identify any discrepancies or contradictions present. This will help us confirm whether option 'A' is indeed the most suitable choice.

5. Final verdict:
After thoroughly analyzing the question and all the options, we can conclude that option 'A' is the correct answer.

In summary, by following the given rules and guidelines, we have determined that option 'A' is the correct answer for this question. It is essential to carefully evaluate each option and compare them to come to a reliable conclusion.