Find the missing term in the given sequence: RUA, UBG, XIL, APP, DWS,?

The correct answer is (d) PQL.

The sequence is a simple substitution cipher, where each letter is replaced by the letter three places after it in the alphabet. So, R becomes P, U becomes Q, A becomes L, and so on.

The missing term is therefore PQL, which comes after DWS in the alphabet.

(a) PIT is incorrect because T is not three places after S in the alphabet.
(b) GBM is incorrect because M is not three places after B in the alphabet.
(c) GDU is incorrect because U is not three places after D in the alphabet.