Question: Task 1. You are given a nested list A. Write a program that creates a list B with all unique elements of A. E.g. for

Task 1. You are given a nested list A. Write a program that creates a list B with all unique elements of A. E.g. for A [[1, 2, 3], [2, 3, 4], [1]1 the expected output is B=[1, 2, 3, 4]
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