In this disease based odd one out question, select the disease that is not primarily transmitted by mosquitoes among Tuberculosis, Chikungunya, Malaria and Dengue.

Introduction / Context:
This question lies in the general science and health awareness category. You are asked to identify which disease among the four options is not primarily mosquito borne. Public health and disease transmission mode awareness are important topics in many general knowledge and competitive examinations.

Given Data / Assumptions:

• The diseases listed are Tuberculosis, Chikungunya, Malaria and Dengue.
• We consider the main mode of transmission for each disease.
• We assume standard medical knowledge about common infectious diseases.

Concept / Approach:
The idea is to recall how each disease spreads. Chikungunya, Malaria and Dengue are all widely known to be transmitted by mosquitoes. Tuberculosis, however, is transmitted mainly through airborne droplets when an infected person coughs or sneezes. Therefore, the disease that is not mosquito borne is the odd one out.

Step-by-Step Solution:
Step 1: Chikungunya is a viral disease transmitted to humans by the bite of infected Aedes mosquitoes.Step 2: Malaria is a parasitic disease transmitted by the bite of infected female Anopheles mosquitoes.Step 3: Dengue is another viral infection transmitted by Aedes mosquitoes, especially Aedes aegypti.Step 4: Tuberculosis is a bacterial infection caused by Mycobacterium tuberculosis, typically spread through airborne droplets from an infected person and not through mosquito bites.Step 5: Since Chikungunya, Malaria and Dengue are mosquito borne diseases and Tuberculosis is not, Tuberculosis is the odd one out.
Verification / Alternative check:
You can verify by recalling common public health messages and campaigns. Malaria and Dengue are often mentioned together in mosquito control initiatives. Chikungunya is also discussed alongside other mosquito transmitted diseases. Tuberculosis campaigns focus on covering mouths while coughing, diagnosis, medication adherence and respiratory transmission, showing that its mode of spread is different from mosquito borne diseases.

Why Other Options Are Wrong:
Chikungunya is not the odd one out because it is clearly transmitted by mosquitoes.
Malaria is a classic mosquito borne disease, making it part of the majority group.
Dengue is again a mosquito transmitted disease and therefore not the unique option.

Common Pitfalls:
Some candidates may not recall exactly how each disease spreads and might guess based on familiarity of names. Another pitfall is confusing diseases that share symptoms such as fever and body aches but differ in transmission mode. To avoid confusion, it is useful to revise major diseases along with their mode of transmission and preventive measures.

Final Answer:
The only disease that is not primarily mosquito borne is Tuberculosis, so Tuberculosis is the odd one out.