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Consider a relation R(A, B) that contains r tuples, and a relation S(B, C) that contains s tuples; assume r > 0 and s > 0. Make no assumptions about keys. For the following relational algebra expression, in terms of r and s the minimum and maximum number of tuples that could be in the result?

given answer is: minimum:0, maximum: min(r,s)

according to me: minimum:0, maximum: r

please give answer with proper explanation.

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