Which one of the following pairs of terms is composed of like terms? A. 4mn, 3my B. 2a, 2b C. –3x, +3y D. abc, cab

Answer:D.abc,cabStep-by-step explanation:We are given that some pairs of terms We have to find the pairs of terms is composed of like terms.Like terms : In algebra , like terms are those terms in which variables with power are same in the terms.A.4mn,3myIn given pair ,variables  n and y are not same .Therefore, 4 mn and 3 my are not like terms.B. 2a , 2bIn given pair variable a in first term and variable b in second term are not same. Therefore, given pair are not like terms.C.-3x,3yVariable x and y are not same therefore, it is not the pair of like terms.D.abc, cabIn given pair  variable a with power is same in both terms, variable b with power is same in both terms and variable c with power is same in both terms.Hence, the pair is a pair of like terms.Answer: D.abc cab.