Which of the following is a valid variable name in Python? 3_numbers my_variable global variable#1

The valid variable name in Python from the given options is "my_variable".

In Python, variable names must start with a letter or an underscore, cannot start with a number, can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ ), and are case-sensitive.

So, "3_numbers" is not valid because it starts with a number. "global" is not valid because it's a reserved keyword in Python. "variable#1" is not valid because it contains a special character (#). "my_variable" meets all the criteria, so it's the only valid variable name in the list.