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This question was there just to annoy people and their train of thought basically during the exam :(
it did trouble me but i somehow managed to get it right, but kept coming back to it again n again to understand what exactly it was trying to ask.
submitted by ∗icedcoffeeislyfe(56)
This question is worded extremely poorly-- Basically I looked at it as if 1) the twin studies showed that it was 50% genetic 2) the other studies only found loci accounting for a small percent of that heritability
Based on 1 & 2 you can get to the answer