# The Persons a and b in X are Said to be Related :

Let X be the set of all person living in Delhi. The persons a and b in X are said to be related if the difference in their ages is at most 5 years. The relation is

- an equivalence relation
- reflexive and transitive but not symmetric
- symmetric and transitive but not reflexive
- reflexive and symmetric but not transitive

**Answer: (4) reflexive and symmetri but not transitive **