Statement: Ramesh decided to get the railway reservation in February for the journey he wants to make in May to Chennai.
Assumption:
I. The railway issues reservations three months in advance.
II. There are more than one train to Chennai.
III. There will be vacancy in the desired class.
Only I is implicit
In the statement nothing has been given about the number of trains and vacancy for reservation. Therefore, assumptions II and III are not implicit. However, it is given Ramesh takes reservation for May in February which clearly indicates that there is provision of reservation three months in advance. So, assumption I is implicit.