In an office, at various times during the day the boss gives the secretary a letter to type, each time putting the letter on top of the pile in the secretary's inbox. Secretary takes the top letter and types it. Boss delivers in the order 1, 2, 3, 4, 5 which cannot be the order in which secretary types?  Choose one:
A) 4, 5, 2, 3, 9
B) 4, 5, 2, 3, 1
C) 4, 5, 2, 3, 0
D) 4, 5, 2, 3, 2
E) 4, 5, 2, 3, 7
4, 5, 2, 3, 1   Answer:	4, 5, 2, 3, 1
<result>B</result>
In an office, at various times during the day the boss gives the secretary a letter to type, each time putting the letter on top of the pile in the secretary's inbox. Secretary takes the top letter and types it. Boss delivers in the order 1, 2, 3, 4, 5 which cannot be the order in which secretary types?