Let's analyze each statement to identify inaccuracies:
(A) Gametocytes of Plasmodium develop in the RBCs: This statement is accurate. Plasmodium gametocytes, the sexual stages, mature within red blood cells (RBCs) prior to mosquito ingestion.
(B) Ascariasis pathogens are transmitted to a healthy person through the bite by female mosquito vectors: This statement is inaccurate. Ascariasis, caused by Ascaris lumbricoides, is transmitted via the ingestion of contaminated food or water, not by mosquito bites.
(C) Entamoeba histolytica is a helminth parasite in the small intestine of humans, causing amoebiasis: This statement is inaccurate. Entamoeba histolytica is a protozoan parasite, not a helminth, and it causes amoebiasis in the intestines.
(D) Malarial parasite reproduces asexually in the gut of the mosquito: This statement is inaccurate. The malarial parasite (Plasmodium) undergoes sexual reproduction in the mosquito's gut; asexual reproduction occurs within the human host.
(E) Filarial worms reside in the lymphatic vessels of the lower limbs: This statement is accurate. Filarial worms, such as Wuchereria bancrofti, typically inhabit the lymphatic system, leading to conditions like lymphatic filariasis.
Statements (B), (C), and (D) are incorrect. The correct option identifying these is: (B), (C) and (D) only