If N is selected, then the we’ll have to pick a geologist to be the other inexperienced astronaut. We can pick either M, P or T.
That means we need one geologist and one radiobiologist from the experienced astronauts. F is the only geologist, so A is CORRECT.
J, L, M and T all could be selected (answer choices B-D), but none of them have to be.
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Jessica says
But, doesn’t L have to be chosen, because of the rule that either P or L is chosen, and P can’t be?
FounderGraeme Blake says
But P could be chosen. For instance:
FL
PN
Is fine. Or:
FJ
PN