Answer:
b. {1,2,3,4}
Step-by-step explanation:
A rational number is one that can be written in the form p/q where p and q are integers
Any whole number n can be written as the ratio n/1 so any integer is a rational number
1.33333333 cannot be written in the firm p/q so it is not rational.
(Note that if the number were 1333333..... which means the 3 is repeating, then it can be written as 4/3 )
e is not a rational number. The value of e=2⋅718281⋅⋅⋅⋅ cannot be specified to any decimal point because the decimal keeps going on.
All the other numbers in the three sets are integers and hence rational numbers
So the only set which has all rational numbers = {1, 2, 3, 4}