Differentiate between boxing and unboxing.

Assertion (A): Integer class can be used in the program without calling a package.

Reason (R): It belongs to the default package java.lang.

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

The method to convert a lowercase character to uppercase is:

1. String.toUpperCase( )
2. Character.isUppercase( char )
3. Character.toUpperCase( char )
4. toUpperCase ( )

Predict the output of the following code snippet:

char ch='B',
char chr=Character.toLowerCase(ch); 
int n=(int)chr-10; 
System.out.println((char)n+"\t"+chr);