Consider the following piece of code:"""Module for simple mathematical calculations"""class calculate:"""Implements simple maths functions"""def add$($num$1,$ num$2)$:$"""$Add two numbers"""a$=$num$1+$num$2$# print the resultprint$(\text{'}$Result is $\text{'},$a$)$What does line $7$ represent?This type of question contains radio buttons and checkboxes for selection of options. Use Tab for navigation and Enter or space to select the option.optionAModule docstringoptionBCode commentoptionCFunction docstringoptionDClass docstring