class a protected int method1 a b return 0 which is..., OOP Concepts,

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Question:class A 
{  
    protected int method1(int a, int b) 
    {
        return 0; 
    } 
}
Which is valid in a class that extends class A?

A public int method1(int a, int b) {return 0; } 
B private int method1(int a, int b) { return 0; } 
C public short method1(int a, int b) { return 0; } 
D static protected int method1(int a, int b) { return 0; }

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Question:class A { protected int method1(int a, int b) { return 0; } } Which is valid in a class that extends class A?

A public int method1(int a, int b) {return 0; }

B private int method1(int a, int b) { return 0; }

C public short method1(int a, int b) { return 0; }

D static protected int method1(int a, int b) { return 0; }

A