What is a list comprehension ?

What is a 2D list ?

Is Ragged list a nested list ?

What will be the output of the following Python code ?

a = [10,23,56,[78, 10]]
b = list(a)
a[3][0] += 17
print(b)

1. [10, 23, 71, [95, 10]]
2. [10, 23, 56, [78, 25]]
3. [10, 23, 56, [95, 10]]
4. [10, 34, 71, [78, 10]]