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Select the correct statement w.r.t. anatomical structure of cockroach?

A) Ventral diaphragm in the haemocoel is non-perforated

B) Chitinous membrane is permeable to digestive enzyme and digested substance

C) Collateral gland forms outermost covering of ootheca

D) Crystalline cone of ommatidium is made up of 4 type of conical cells