Assertion (A) The private access specifier achieves the lowest level of accessibility.
Reason (R) The private methods and fields can be accessed only within the same class to which the methods and fields belong.

1. Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
2. Both Assertion (A) and Reason (R) are true and Reason (R) is not a correct explanation of Assertion (A).
3. Assertion (A) is true and Reason (R) is false.
4. Assertion (A) is false and Reason (R) is true.

State the data type after the following is executed :

char ch = '9';
res = Character.isDigit(ch);

1. int
2. char
3. string
4. boolean

If

String x = "Computer";	
String y = "Science";

What will the following return?

(a) System.out.print(x.substring(2,6));

(b) System.out.print(x.indexOf(x.charAt(5)));

Write the Java statement for the following mathematical expression :

x = $\dfrac{(a + b)^2}{\sqrt{a + b}}$