Identify the incorrect statements.

(A) Gametocytes of Plasmodium develop in the RBCs.
(B) Ascariasis pathogens are transmitted to a healthy person through the bite by the female mosquito vectors.
(C) Entamoeba histolitica is a helminth parasite in the small intestine of human which causes amoebiasis.
(D) Malarial parasite reproduces asexually in the gut of mosquito.
(E) Filarial worms reside in the lymphatic vessels of the lower limbs.

Choose the correct answer from the options given below:

(B), (C) and (D) only

The correct answer is Option (2) → (B), (C) and (D) only 

Explanation of Each Statement:

(A) Gametocytes of Plasmodium develop in the RBCs.

• Correct: The sexual stages (gametocytes) of the malaria parasite Plasmodium develop inside red blood cells (RBCs).

(B) Ascariasis pathogens are transmitted to a healthy person through the bite by the female mosquito vectors.

• Incorrect: Ascariasis is caused by Ascaris lumbricoides (a parasitic roundworm) and is transmitted via ingestion of contaminated food or water, not by mosquito bites.

(C) Entamoeba histolytica is a helminth parasite in the small intestine of humans which causes amoebiasis.

• Incorrect:
• Entamoeba histolytica is a protozoan parasite, not a helminth.
• It resides in the large intestine, not the small intestine, and causes amoebiasis.

(D) Malarial parasite reproduces asexually in the gut of mosquito.

• Incorrect: The malarial parasite reproduces sexually in the gut of the mosquito. The asexual reproduction occurs in the human host (liver and RBCs).

(E) Filarial worms reside in the lymphatic vessels of the lower limbs.

• Correct: Filarial worms (e.g., Wuchereria bancrofti) reside in the lymphatic vessels, commonly affecting the lower limbs, causing diseases like elephantiasis.

Summary:

The incorrect statements are (B), (C), and (D).