In the following list of letters, how many O's are followed by Q's but not preceded by D's ?
D O Q O D Q O D O D Q D O Q D S D Q P
O Q D S S S D O Q O Q D O Q D D D O Q
Option:
A. 0
B. 1
C. 2
D. 3
Answer: C . 2
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Justification:
D O Q O D Q O D O D Q D O Q D S D Q P O
Q D S S S D O Q O Q D O Q D D D O Q
