In sets a-e below, identify two sets of synonyms.

(vi) In sets a-e below, identify two sets of synonyms.

a. richness and poverty
b. intellectual and moral
c. reduction and promotion
d. essential and intrinsic
e. urgent and crucial
Options:
(A) a and c
(B) b and
(e) d and e
(D) b and d

The correct answer is: (D) b and d