Which of the following is not rational

Option A.

Step-by-step explanation:

Rational numbers -

Numbers that can be written as fraction of two whole numbers. They can be positive, negative or zero.They are numbers that can be written as fractions.So, options B and C are examples of rational numbers.

Vinculum or Bar numbers -

These numbers are repeating decimals. They are written with a line or a bar on top of the repeating numbers.Bar numbers are irrational numbers.So, option A is not a rational number.

Skew lines(segments) are lines(segments) in 3 dimensions that do not intersect the given segment and are not parallel to it.  ae, bf, eg, and fh are your skew segments.  i hope that : )