JEE Main 2013 Mathematics question

Let A = {1, 2, 3, 4} and R : A → A be the relation defined by R = {(1, 1), (2, 3), (3, 4), (4, 2)}. The correct statement is :

Answer: (3)

Solution

Each element has exactly one image (a function), the images 1, 3, 4, 2 are

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Question ID VK-103973