Option B is the correct answer.
We need to find which of the given options is an example of an irrational number between 6 and 7.
Irrational numbers are the set of real numbers that cannot be expressed in the form of a fraction, p/q where p and q are integers. The denominator q is not equal to zero (q ≠ 0). Also, the decimal expansion of an irrational number is neither terminating nor repeating.
From the given options can see that 6.12345... is non-terminating and repeating decimal.
Therefore, option B is the correct answer.
To learn more about irrational numbers visit:
https://brainly.com/question/4031928.
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