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Circulatory system Phylum A. Closed circulatory system 1. Aschelminthes B. Open circulatory system 2. Annelida C. No circulatory system 3. Arthropoda D. Both closed and open circulatory systems 4. Mollusca

Options

  1. AA - 2, B - 3, C - 1, D - 4
  2. BA - 1, B - 2, C - 3, D - 4
  3. CA - 1, B - 2, C - 1, D - 4
  4. DA - 1, B - 2, C - 3, D - 4

Correct answer

A. A - 2, B - 3, C - 1, D - 4

Step-by-step solution

Annelida have a closed circulatory system, Arthropoda have an open circulatory system, Aschelminthes have no distinct circulatory system, and Mollusca can have either.

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