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L is older than M and taller than N. O is younger than P, older than N and shorter than Q. R is older than S, younger than N, shorter than S and taller than Q. S is older than L, M, O, P, Q, R and S is necessarily false?
In arches, stratified stones are placed so that their planes are
In the construction of arches, sand box method is used for
The lintels are preferred to arches because