Statement: The persons who were on the waiting list could finally get berth reservation in Rajdhani Express.
Conclusions:
I. Wait listed passengers generally find it difficult to get berth reservation in Rajdhani Express.
II. The number of berth available in the Rajdhani Express is small.
If only conclusion I follows
Conclusion I is a valid conclusion as the use of word ‘could’ implies a difficulty in obtaining reservation but conclusion II is invalid as it is not certain.