Answer: Option 'D' is correct.
Explanation:
Since we know that
Rational numbers are those numbers which can be written in the form of p/ q and which can be non terminating but recurring number.
And we know that π ,√ 7 , 0.83587.... are non terminating non recurring number.
That means they are irrational number.
whereas 0.33333.... is non terminating but recurring number which satisfy the condition of rational number.
So, 0.3333333.... is considered as rational number.
Hence, option 'D' is correct.