What will be the output of the following Python code?

>>> a=(2,3,1,5)
>>> a.sort()
>>> a

Which of the following data types in Python is mutable?

A. List

B. Tuple

C. String

D. Dictionary

What method is used to insert an element at a specific index in a list or tuple?

A. insert()

B. add()

C. append()

D. push()

What does the len() function do when applied to a list or tuple?

A. Returns the length of the list or tuple

B. Converts the list or tuple to lowercase

C. Converts the list or tuple to uppercase

D. Removes the last element

How can you add an element at the end of a list or tuple in Python?

A. append()

B. add()

C. insert()

D. extend()