B) The correct answer is option 'B'.

Explanation:
To provide a detailed explanation for the correct answer, let's break it down into headings and key points:

1. Understanding the question:
- The question belongs to the UPSC category.
- It requires the identification of the correct option among options 'a', 'b', 'c', and 'd'.

2. Analyzing the options:
- Option 'A': Not provided in the question.
- Option 'B': The correct answer according to the provided information.
- Option 'C': Not provided in the question.
- Option 'D': Not provided in the question.

3. Reasoning for choosing option 'B':
- Since the question does not provide any specific information about options 'A', 'C', and 'D', we can focus on option 'B', which is identified as the correct answer.
- It is important to note that without any additional information, we cannot definitively state why option 'B' is correct. However, based on the given options, 'B' is the most suitable choice.

In conclusion, the correct answer to the question is option 'B'. However, without additional context or information provided in the question, it is difficult to provide a more detailed explanation.