The correct answer is: C. both (a) and (b)
The >> (extraction) operator stops reading characters from the keyboard as soon as the user presses the Enter key or types a character that is inappropriate for the variable’s data type.
For example, if we have a variable x of type int, and we try to extract a character from the keyboard using the following code:
x = input('Enter a number: ')
The user will be able to enter any character, but as soon as they press the Enter key, the extraction will stop and the value of x will be the number that the user entered.
However, if the user types a character that is not a number, such as a letter or a symbol, the extraction will stop and the value of x will be None.
Here is an example of this:
x = input('Enter a number: ')
print(x)
If the user enters the number 123, the output will be 123. However, if the user enters the letter a, the output will be None.