Which number is irrational? a. 3 over 8 b. square root of 56 over 8 end root c. fraction numerator square root of 36 over denominator square root of 4 end fraction d. syntax error from line 1 column 53 to line 1 column 60. unexpected '0'.

The correct answer is letter  D. Syntax error from line 1 column 53 to line 1 column 60. Unexpected '0'. In order for a number to be considered as irrational when there is no possible ratio for that number. Among the four choices, choice D only tells us that the possible ratio or fraction has a denominator of Zero.