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Answer the questions based on the information given below:

Twenty one participants from four continents (Africa, Americas, Australia, and Europe) attended a United Nations conference. Each participant was an expert in one of four fields, labour, health, population studies, and refugee relocation. The following five facts about the participants are given:

  • The number of labour experts in the camp was exactly half the number of experts in each of the other three categories.
  • Africa did not send any labour expert. Otherwise, every continent, including Africa, sent at least one expert for each category.
  • None of the continents sent more than three experts in any category.
  • If there had been one less Australian expert, then the Americas would have had twice as many experts as each of the other continents.
  • Mike and Alfanso are leading experts of population studies who attended  the conference. They are from Australia.

Alex, an American expert in refugee relocation, was the first keynote speaker in the conference. What can be inferred about the number of American experts in refugee relocation in the conference excluding Alex?

  1. At least one
  2. At most two
    1. Only I not II
    2. Only II not I
    3. Both I and II
    4. Neither I nor II
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