Question

From among the given alternatives , identify the missing premiss.
1st Premiss: If a plane triangle is possible . then perfect straight line is possible
2nd Premiss : If perfect straight line is possible, then Euclid is right
3rd Premiss:
4th Premiss: But Riemann is right.
Conclusion : Therefore a plane triangle is not possible.

• A. If Riemann is right, then Euclid is right
• B. If Riemann is wrong, then Euclid is right
• C. If Euclid is right, then Riemann is wrong
• D. If Riemann is right,then Euclid is not wrong

Answer 1

The correct option is C If Euclid is right, then Riemann is wrong

'But' word in the fourth premises required something in contrast with the statement, Only statement (c) brings out such contrast.