The …………… method removes the last entered element from the dictionary.

1. pop()
2. remove()
3. popitem()
4. del

Srishti is down with fever, so she decides not to go to school. The next day, she calls up her classmate Shaurya and enquires about the computer class. She also requests him to explain the concept taught in the class. Shaurya quickly downloads a 2-minute video clip from the internet explaining the concept of Tuples in Python. Using video editor, he adds this text in the downloaded video clip: "Prepared by Shaurya". Then, he emails the modified video clip to Srishti. This act of Shaurya is an example of:

1. Fair use
2. Hacking
3. Copyright infringement
4. Cyber crime

Assertion (A): In Python, a variable can hold values of different types at different times.

Reason (R): Once assigned, a variable's data type remains fixed throughout the program.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Assertion (A): Python lists allow modifying their elements by indexes easily.

Reason (R): Python lists are mutable.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.