Answer:
The answer is: Cherries. 
Explanation: 
The glycemic index is a numerical value that is assigned to a food to describe the glycemic response our body has after its consumption. That is, the higher the glycemic index, the higher and faster elevation of blood glucose produces a food after consumption. 
Top 10 fruits with lower glycemic index -40 
Cherries (22) 
Plums (24) 
Grapefruit (25) 
Peach (28) 
Prunes (29) 
Dried apricots or apricots (30) 
Fresh Apricot (34) 
Pears (37) 
Apples (37) 
Plums (39) 
The answer is: Cherries.