. Which of the following is a valid variable name in Python?Amy_variableB123_variableCvariable#D2nd_variable

The valid variable names in Python from the given options are:

A) Amy_variable B) 123_variable C) variable#

Python variable naming rules are:

1. A variable name must start with a letter or the underscore character.
2. A variable name cannot start with a number.
3. A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ ).
4. Variable names are case-sensitive (age, Age and AGE are three different variables).

So, according to these rules:

A) Amy_variable is a valid variable name because it starts with a letter and contains only letters and an underscore.

B) 123_variable is not a valid variable name because it starts with a number.

C) variable# is not a valid variable name because it contains a character (#) that is not alphanumeric or an underscore.

D) 2nd_variable is not a valid variable name because it starts with a number.