A queue is implemented using two stacks S1 and S2. Initially the queue contains 1, 2, 3, 4 from front
to rear. The following operations are performed in the queue: delete, insert (5), delete, Then how
many total no. of push and pop operations are needed to perform the above operation?
a) Push: 12 Pop: 13
b) Push: 15 Pop: 16
c) Push: 11 Pop: 10
d) Push: 12 Pop: 11