Which is the correct sequence of labeling for the given figure?

  • A
    $P$ - Valve,$Q$ - Ostia,$R$ - Pump,$S$ - Artery,$T$ - Haemocoel,$U$ - Artery
  • B
    $P$ - Valve,$Q$ - Ostia,$R$ - Pump,$S$ - Artery,$T$ - Haemocoel,$U$ - Artery
  • C
    $P$ - Valve,$Q$ - Ostia,$S$ - Artery,$T$ - Haemocoel,$R$ - Pump,$U$ - Vein
  • D
    $P$ - Valve,$Q$ - Ostia,$S$ - Haemocoel,$T$ - Artery,$R$ - Vein,$U$ - Pump

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