Shoot gall maker is a part of -

Correct option is A

The correct answer is (a) Aonla. 
Explanation:
The "shoot gall maker" is a pest known as Betousa stylophora, which specifically attacks the aonla (Indian gooseberry) tree. The pest causes galls to form on the shoots of the plant. 
Why other options are incorrect:
· (b) Banana:
While bananas are susceptible to various pests, the shoot gall maker is not one of them.
· (c) Apple:
Apples have their own set of pests, but the shoot gall maker is not typically associated with apple trees.
· (d) Ber:
Ber (Indian jujube) is another fruit tree, but the shoot gall maker is specific to the aonla.