The correct answer is: Only conclusion I follows.
The first statement is “Many scooters are trucks.” This means that there is a subset of scooters that are also trucks. The second statement is “All trucks are trains.” This means that all trucks are also trains.
The first conclusion is “Some scooters are trains.” This conclusion follows from the first statement, because if there is a subset of scooters that are also trucks, then some scooters must be trains.
The second conclusion is “No truck is a scooter.” This conclusion does not follow from the statements, because the statements do not say anything about whether or not there are trucks that are not scooters.
Therefore, the correct answer is: Only conclusion I follows.
Here is a more detailed explanation of each option:
- Option A: Only conclusion I follows. This is the correct answer, as explained above.
- Option B: Only conclusion II follows. This is not the correct answer, because the second conclusion does not follow from the statements.
- Option C: Either I or II follows. This is not the correct answer, because only conclusion I follows from the statements.
- Option D: Neither I nor II follows. This is the correct answer, because the second conclusion does not follow from the statements.
- Option E: Both I and II follow. This is not the correct answer, because only conclusion I follows from the statements.