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Which of the following statements about stack data structure is NOT correct? Linked List can be used for implementing Stacks . First node inserted into stack will go to index 0. Top of the Stack always contain the new node. Stack is the FIFO data structure. What is the time complexity to remove an element from a maximum or minimum priority queue? O(1) O(log n) O(n) O(n2) Given an array arr - {45, 77, 89, 90, 94, 99, 100} and key = 99; what is the middle value in the first cycle of binary search? 99 89 94 90 If the elements '1', '2', '3' and '4' are added in a queue, what would be the order for the removal? 4321 2134 Based on user input 1234