Statements: All books are clocks. Some clocks are chips. Which of the given conclusions follow?
1.Some clocks are books
2.No clocks are books
3.Some books are chips
4.No books are chips
A1 and 3 follow
BOnly 1 follows
CEither 1 or 2 follows
DEither 3 or 4, and 1, follow ✓ Correct
Correct answer: (D) Either 3 or 4, and 1, follow
Explanation
Conclusion 1 follows, and of 3 and 4 exactly one must, so either 3 or 4 follows.
'All books are clocks' converts to 'some clocks are books', giving 1.
Books lie within clocks, and only some clocks are chips.
Whether any book is a chip cannot be fixed from this.
'Some books are chips' and 'no books are chips' are contradictories, so one of them holds.
This makes them an either-or pair alongside the settled first conclusion.
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