PT28.S1.Q05 - the number of codfish in the north atlantic

heugene15

http://7sage.com/lsat_explanations/lsat-28-section-1-question-05/
Could someone kindly explain the reason "D" is the right answer? Thanks.

DumbHollywoodActor

Remember G3-->Q5, but Q is clearly in 4, so that negates the necessary condition, triggering a negation of the sufficient condition. In other words, G cannot be in 3. That leaves only J and H for slot 3. Hence, answer D