For `num_diff = Diff(5, 25)`, complete the code to print the following output when `num_diff` is printed.First Number: 5 Second Number: 25 Difference: -20```pythonclass Diff: def __init__(self, num1, num2): self.num1 = num1 self.num2 = num2 def __str__(self): XXX```Options for XXX:1. `return '{}'.format(self.num1 - self.num2)`2. `return 'First Number: {} Second Number: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))`3. `return 'First Number: {} Second Number: {} Difference: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))`4. `return('First Number: {} \nSecond Number: {} \nDifference: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))`The correct option is option 3:```pythonreturn 'First Number: {} Second Number: {} Difference: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))```This will correctly format the output as: "First Number: 5 Second Number: 25 Difference: -20" when `num_diff` is printed.

option c) return ('First Number: {} Second Number: {} Difference: {}'.format(self.num1,self.num2,(self.num1-self.num2)))I have provided python code along with code screenshot and also provided output screenshot-----------# Creating a classclass diff: # this function takes two parameters def __init__(self,num1,num2): self.num1=num1 self.num2=num2 # this function is used to return desired output def __str__(self): return ('First Number: {} Second Number: {} Difference: {}'.format(self.num1,self.num2,(self.num1-self.num2)))if __name__ == '__main__': # call the function using class object num_diff=diff(5,25) # print desired output print(num_diff)