In a stack with unknown initial state $($we do not know if the stack is empty or not$),$ a push operation is applied and succesfully executed. Then, we want to execute a pop operation.

Select the correct option:

It can be deduced that the stack had at least one element before the push operation.

The pop operation will return an element, except in the case the stack was empty before the push operation.

It can be deduced that the stack was empty before the push operation.

The pop operation will return an element, independently of the initial state of the stack.