Three statements are given, followed by four conclusions numbered I, II, III,…
2023
Three statements are given, followed by four conclusions numbered I, II, III, and IV. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements? Statements: All boats are fishes.
Some fishes are rivers.
Some rivers are sailors.
Conclusions: I. Some sailors are fishes. II. Some boats are sailors. III. Some rivers are boats. IV. Some fishes are boats.
- A.
Only conclusions II and III follow
- B.
Only conclusion IV follows
- C.
Only conclusions I, II and IV follow
- D.
Only conclusions I and II follow
Attempted by 129 students.
Show answer & explanation
Correct answer: B
I. Some sailors are fishes.
We know:
Some fishes → rivers → some rivers → sailors.
But these two ‘some’ chains do not guarantee overlap.
So not definite.
❌ Does not follow
II. Some boats are sailors.
Boats ⊆ fishes
But no statement links boats with rivers or sailors.
❌ Does not follow
III. Some rivers are boats.
Fishes ∩ rivers is possible, but nothing forces boats to be in that intersection.
❌ Does not follow
IV. Some fishes are boats.
Given: All boats are fishes
This always guarantees:
→ Some fishes are definitely boats (because boats exist).
✔️ Follows