Let L denote the set of all straight lines in a plane.Let a relation R be defined by `alpha R beta <=>alpha _|_ beta,alpha,beta in L`.Then R is

Let L denote the set of all straight lines in a plane.Let a relation R be defined by alpha R beta hArr alpha perp beta,alpha,beta in L. Then R is

Let L denote the set of all straight lines in a plane. Let a relation R be defined by a R b hArr a bot b, AA a, b in L . Then, R is

Let L denote the set of all straight lines in a plane. Let a Relation R be defined on L by xRy iff x||y , for x,y in L then R is

Let L denote the set of all straight lines in a plane. Let a relation R be defined by l\ R\ m iff l is perpendicular to m for all, l ,\ m in L . Then, R is (a) reflexive (b) symmetric (c) transitive (d) none of these

Let L denote the set of all straight lines in a plane. Let a relation R be defined by l\ R\ m if and only if l is perpendicular to m for all , l ,\ m in L . Then, R is (a) reflexive (b) symmetric (c) transitive (d) none of these

Let R be the relation over the set of straight lines in a plane such that l R m iff l bot m . Then R is :

Let L be the set of all straight lines in the Euclidean plane. Two lines l_(1) and l_(2) are said to be related by the relation R if l_(1) is parallel to l_(2) . Then, relation R is not

Let L be the set of all straight lines in the Euclidean plane. Two line l_(1) and l_(2) are said to be related by the relation R of l_(1) is parallel to l_(2) , Then R is