Assumption I: Reaching office in time may not be always necessary.
This assumption does not directly follow from the statement. The statement indicates that reaching the office on time is currently difficult due to potholes, but it does not imply that reaching on time is unnecessary. Therefore, Assumption I is not implicit.
Assumption II: There is no other convenient road to the office.
This assumption is implied by the statement. The statement suggests that the problem of potholes is significant enough to cause delays. It implies that the condition of this particular road is crucial for reaching the office on time, which can indicate that there may not be other convenient routes available. Thus, Assumption II is implicit.