A relation `R_(1)` is defined on `RxxR rarr RxxR` by `(a, b)R_(1)(c, d) implies a+b+c+d` is positive. How many statements `S_(1), S_(2), S_(3), S_(4)` are CORRECT ?
`S_(1)` : Relation is Reflexive but not Symmetric
`S_(2)` :, Relation is Symmetric but not Transitive
`S_(3)` : Relation is Transitive but not Symmetric
`S_(4)` : Relation is Equivalence
A. `0`
B. `1`
C. `2`
D. `4`
