The correct option is A 19 and 29
Concept: Like fractions have same denominator.
19 and 29 is a pair of like fractions because denominator in both the fractions are equal.
14 and 29 are not like fractions because denominator in both the fractions are not equal.
19 and 25 are not like fractions because denominator in both the fractions are not equal.
∴ Option A is the correct answer