Q20. ASSERTION (A): The relation f / \{1, 2, 3, 4\} - \{x, y, z, p\} defined by f = \{(1, x), (2, y

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Q20. ASSERTION (A): The relation f / \{1, 2, 3, 4\} - \{x, y, z, p\} defined by f = \{(1, x), (2, y), (3, z)\} is a bijective function. REASON (R): The function f / \{1, 2, 3\} -\{x, y, z, p\} such that f = \{(1, x), (2, y), (3, z)\} is one-one.
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