In the question, four statements are given, followed by two conclusions, 1, 2 and 3. You have to consider the statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.
Statement:
1) All phones are chargers
2) Some chargers are Speakers
3) Some phones are not pen drives.
4) All Speakers are monitors.
Conclusion:
1) Some speakers can be pen drives.
2) Some chargers that are not phones are pen drives.
3) All chargers can be pen drives.
Solution
Conclusion 1) Some speakers can be pendrives.
The only condition we have about pendrives, is 3)Some phones are not pendrives.
Otherthan this we have no exclusion for pendrives. So, some speakers can be pendrives.
Conclusion 2) Some chargers that are not phones are pendrives.
We are just told that some phone are not pendrives. But we don't have any information about what pendrives are exactly. So, we can't surely say some chargers are pendrives.
Conclusion 3) All chargers can be pendrives.
We know that some phones are not pendrives. We also know that all phones are chargers. Since, some phones are not pendrives, some part of chargers can't be pendrives. So, all chargers can't be pendrives.
