The statement "The secret of success is consistency of purpose" suggests that achieving success requires a focused and consistent effort toward a specific goal. Let's evaluate the conclusions:
Conclusion I:
"It is difficult for a person to be consistent."
- This conclusion does not logically follow from the statement. While consistency may be challenging, it is not a necessary implication of the statement. The statement does not claim that consistency is inherently difficult, but rather that it is crucial for success.
Conclusion II:
"Single-minded devotion will highly help for achieving success."
- This conclusion is supported by the statement. Consistency of purpose implies dedication and single-minded focus on one's goals, which is essential for achieving success. Thus, this conclusion aligns well with the statement.
Therefore, the correct answer is (B) – only conclusion II is strong.