Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
PQR, STU, VWX, ?
AYZD
BYVA
CYZA
DDFR
AYZD
BYVA
CYZA
DDFR
Related Questions:
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the
Statements:
Some whales are sharks.
No shark is a dolphin.
Conclusions:
(1) No dolphin is a shark.
(Il) Some sharks are whales.