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[" Let "L" denote the set of all straigh...

[" 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 "],[[" (a) reflexive "," (b) symmetric "],[" (c) transitive "," (d) None of these "]]

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