16. If 'p' parallel to 'q' and 'q' parallel to 'r then
(a)p always parallel tor (b) p sometimes parallel tor
(c) p never parallel tor
(d) none of these.
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P is always parallel to r. This is because if p and q are going in a straight line that is if they are parallel, then the parallel of q that is r is also going in the same line, being parallel to p.
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