RRB Paramedical Staff Nurse Model Paper 5

In the following questions below are given some statements followed by some given conclusions. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements, disregarding commonly known facts. Give answer:
Statements :
Some months are weeks.
Some weeks are years.
All years are buses.
All buses are trains.
Conclusions :
I. Some trains are weeks.
II. Some buses are weeks.
III. Some trains are months