B). 1 third is rational. It's the ratio of 1 to 3 .
C). square root of 4 is rational. It's the ratio of 2 to 1 .
D). square root of 6 is irrational.
A). The whole content of choice-A is an irrational component
of your question. It could have been avoided with just a moment
of proofreading.
