Let A be a set of railway stations in India. A relation R is defined as (x, y) ∈ R if there is a direct train between station x and station y. This relation is always:

Let A be a set of railway stations in India. A relation R is defined as (x, y) ∈ R if there is a direct train between station x and station y. This relation is always:

• A. Reflexive
• B. Symmetric
• C. Transitive
• D. Equivalence

Answer: B) Symmetric

Explanation: If there is a direct train from station x to y, the same train runs from y to x, making it symmetric. It isn't necessarily reflexive (a train from a station to itself is trivial) or transitive.