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What is the time complexity of inserting an element in a binary search tree in the worst case?

A. O(n)
B. O(log n)
C. O(1)
D. O(n^2)

Answer: O(n)

Which data structure follows the FIFO (First In, First Out) principle?

A. Queue
B. Stack
C. Tree
D. Graph

Answer: Queue

Which of the following data structures uses LIFO (Last In, First Out) principle?

A. Stack
B. Queue
C. Linked List
D. Binary Tree

Answer: Stack