The correct option is D 767
The fraction whose numerator is less than the denominator is called a proper fraction.
Hence, value of x (the numerator) should be less than 768 to make the fraction x768 as a proper fraction.
The given options for the values of x are:
768, 769, 770, 767
The given denominator is: 768
767 (the numerator) is possible value of x which is less than 768 (The denominator)
Hence, Option (d) gives the possible value of x (= 767)