Statement : There are two cities A and B are separated by 100 miles via train…

Concept: In Statement-and-Assumption questions, an assumption is implicit only if the statement's own claim necessarily depends on it, and it must follow strictly from what is stated -- never from outside general knowledge (such as which mode of transport is normally faster).

1. Assumption 1 states that at least two transportation media exist between A and B. The statement itself names two modes -- train (100 miles) and flight (60 miles) -- so this is a fact the statement's own wording depends on; it follows.

2. Assumption 2 states that reaching from B to A is quicker via flight. "Quicker" is a claim about TIME, but the statement gives only DISTANCE figures for each mode and no speed or duration for either route. A shorter distance cannot be converted into a shorter travel time without knowing the speeds involved, so this claim does not follow from what is stated.

Cross-check: If Assumption 2 were accepted merely because the flight route covers fewer miles (60 vs 100), that would silently add an assumption about relative speeds that the statement never provides -- precisely the kind of outside knowledge these questions exclude.

Result: Only Assumption 1 is implicit in the statement, so "Only 1 Follows" is the correct choice.