Question:
Which of the following is a rational number?
(a) $1+\sqrt{3}$
(b) $\pi$
(c) $2 \sqrt{3}$
(d) 0
Solution:
Since, the sum and product of a rational and an irrational is always irrational.
So, $1+\sqrt{3}$ and $2 \sqrt{3}$ are irrational numbers.
Also, π is an irrational number.
And, 0 is an integer.
So, 0 is a rational number.
Hence, the correct option is (d).