A) Septal nephridia
B) Pharyngeal nephridia
C) Integumentary nephridia
D) None of these
Correct Answer: B
Solution :
Pharyngeal nephridia are found in paired tufts in 4th , 5th and 6th segment around the oesophagus. Each nephridial tuft is composed of numerous nephridia which open into a common excretory duct These are enteronephric and in this nephrostomcs are absent.
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