Identify the odd one out.

Identify the correct match:

$(a)$	$(b)$	$(c)$
$1$. Typhoid	$a$. Virus	$P$. Nose
$2$. Malaria	$b$. Bacteria	$Q$. Liver cells
$3$. Common cold	$c$. Protozoans	$R$. Small intestine

Housefly transmits all the diseases except

Which pair represents diseases spread through the air?

Identify the molecules $(A)$ and $(B)$ shown below and select the right option giving their source and use.
| Molecule | Source | Uses |
| :--- | :--- | :--- |

The following table shows certain diseases, their causative organisms, and symptoms. Fill in the gaps $(a)$ to $(f)$.

Name of the Disease	Causative organism	Symptoms
Ascariasis	Ascaris	$(a)$
$(b)$	Trichophyton	Appearance of dry, scaly lesions on various parts of the body.
Typhoid	$(c)$	High fever, weakness, headache, stomach pain, constipation.
Pneumonia	Streptococcus pneumoniae	$(d)$
$(e)$	Rhino viruses	Nasal congestion and discharge, sore throat, cough, headache.
Filariasis	$(f)$	Inflammation in lower limbs.