Statements:
1. All roads are streets.
2. Some streets are pathways.
3. All pathways are narrow.
Conclusions:
I. Some narrow are streets.
II. Some roads are narrow.
Correct: A
Let's represent the statements:
Statement 1: All roads are streets. (Roads circle is entirely inside Streets circle).
Statement 2: Some streets are pathways. (Pathways circle overlaps with a portion of the Streets circle).
Statement 3: All pathways are narrow. (Pathways circle is entirely inside Narrow circle).
From Statement 2 and 3: 'Some streets are pathways' and 'All pathways are narrow'. This implies 'Some streets are narrow'.
Now, let's analyze the conclusions:
I. Some narrow are streets. This is a conversion of 'Some streets are narrow', which we derived from the premises. If 'Some A are B', then 'Some B are A' is a valid conversion. Thus, Conclusion I follows.
II. Some roads are narrow. Roads are inside Streets. Some Streets are Narrow. However, the part of Streets that are narrow might not include the Roads. There's no definite link to conclude 'Some roads are narrow'. So, Conclusion II does not necessarily follow.
Therefore, only conclusion I follows.