Fractions with different denominators are called . . . . . . . . . . . . . . fractions.
A. like
B. unlike
C. proper
D. improper

Hint: By knowing what are fractions and the definitions involved in fractions as the terms like fractions, unlike fractions. From the definitions we can conclude that, what type of fraction that is there in the given question.

Complete step-by-step solution -
Like fractions:
They are the group of two or more fractions that have exactly the same denominator. Or we can say that the fractions which have the same numbers at the bottom or in the denominators are called like fractions.
Example: \[\dfrac{1}{2},\dfrac{5}{2}\]

Unlike fractions:
Fractions with different denominators are called, unlike fractions. Here the denominators of fractions have different values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(1)
From definition (1) we can say that the fractions with different denominators are called unlike fractions.
Example: \[\dfrac{1}{2},\dfrac{1}{3}\]
So, option B) is correct.

Note: From the above we can conclude that above fractions having the same denominator are like fractions and with different denominators are unlike fractions. Care should be taken while solving these. Here the key concept to solve this type of problem is remembering the definition of fractions.