question_answer

Four pairs of terms are given as:

(i) \[{{a}^{2}}\]and 3ab

(ii) 3yz and 6zy

(iii) \[{{b}^{2}}\]and\[-11{{b}^{2}}\]

(iv) \[{{a}^{2}}b\]and \[3a{{b}^{2}}\]

Which two given pairs are pairs of unlike terms?

A)  (ii) and (iii)

B)  (ii) and (iv)

C)  (i) and (iii)

D)  (i) and (iv)