Fill the blank spaces with the most appropriate of options A-E:
The armed robbers stabbed the driver …. the back
The correct answer is: A
Explanation
prepositions are all connectors.
In this context "In" is defined as inside an area, moving from a point outside to a point inside.
"On" is used to indicate position, usually indicating that something is on top of something else.
A stab in the back would mean, a stab from the outer area to the inner area. Option A is correct