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Type of oesophagus, where basal bulb has a refractive valve is

A. Aphelenchoid type

B. Criconematid type

C. Neotylenchoid type

D. Rhabditoid type

Answer: Option D

Solution(By Examveda Team)

Type of oesophagus, where basal bulb has a refractive valve is Rhabditoid type.
Esophagus rhabditoid with metacorpus slightly swollen, narrow isthmus surrounded by nerve ring, and large basal bulb with reduced valve. Esophago-intestinal valve is usually pronounced.

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