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6 Back Question 8 Not yet answered Marked out of 1.50 P Flag question Consider the following insertion process in a stack. What is the value of the element at the top of this stack? s.push (item: 1); s.push (item: 2); s.pop(); s.push (item: 3); s.push(item: 4); s.pop(); s.push(item: 5); s.push(item: 6); O A. 3 O B. 6 O C. 5 O D. 1