ibps-rrb-os1 2025 · Question 9 of 71

Statements: Only a few rivers are lakes. Some lakes are oceans. No ocean is a pond. Conclusions: I. All rivers being oceans is a possibility. II. No lake is a pond.

Syllogism

AIf only conclusion I followsCorrect
BIf only conclusion II follows
CIf either I or II follows
DIf neither I nor II follows
EIf both I and II follow

Answer: A. If only conclusion I follows

Explanation

Only a few rivers→lakes: some rivers are lakes, some are not. Some lakes→oceans. No ocean→pond. Conclusion I (all rivers being oceans is a possibility): Rivers⊂lakes⊂(some)oceans — possible ✓. Conclusion II (no lake is a pond): oceans and ponds are disjoint, but lakes can still be ponds — not definite ✗.

Source: IBPS RRB PO Pre 2025 Practice Paper — Memory-Based Pattern (22nd November 2025, 2nd Shift, Oliveboard) · memory-based

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