Amoebiasis causes

The correct option is Dysentry.

Step-by-Step Explanation:
1. Understanding Amoebiasis: Amoebiasis (also known as amoebic dysentery) is a parasitic infection of the intestines caused by the protozoan parasite Entamoeba histolytica.
2. Mode of Transmission: The infection is typically contracted by consuming food or water contaminated with the cysts of the parasite, often due to poor sanitation and hygiene.
3. Symptoms: Once inside the digestive tract, the parasite invades the lining of the large intestine. This causes inflammation, ulcers, and tissue damage, leading to symptoms like abdominal pain, cramping, and severe diarrhea containing blood and mucus, which is medically termed as dysentery.
4. Evaluating the Options:
- Headache and cold / Severe cold: These are viral respiratory symptoms and are not directly caused by intestinal protozoan infections like amoebiasis.
- Fever: While a mild fever can sometimes accompany amoebiasis if the infection becomes systemic or severe, it is not the primary diagnostic symptom.
- Dysentry: This is the classic, defining manifestation of symptomatic Entamoeba histolytica infection.