The correct option is A 9991000
The fraction whose numerator is greater than the denominator is called a improper fraction. 1 is also a improper fraction.
9991000:Numerator < Denominator.
Hence, it is not an improper fraction.
10011000: Numerator > Denominator.
Hence, it is an improper fraction.
10021000 Numerator > Denominator.
Hence, it is an improper fraction.
100001000:Numerator > Denominator.
Hence, it is an improper fraction.
Option (a) is correct.