Primitive and reference types

Classifying Variables as Primitive or Reference in Java

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Consider the following code snippet in Java. What are the correct classifications for variables a, b, and str?

int a = 5;
float b = 3.14f;
String str = "Hello";

Select one option from the list

a is reference, b is primitive, str is reference

a is primitive, b is primitive, str is reference

a is reference, b is reference, str is primitive

a is primitive, b is reference, str is primitive

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