In the given diagram of the life cycle of Plasmodium in the mosquito,what does the part labeled '$a$' represent?

Identify the number of correct statements from the following:
$(1)$ Gene therapy is used in the treatment of $ADA$ deficiency.
$(2)$ Tetanus causes sustained muscle contraction. There is a lack of relaxation phase.
$(3)$ Cigarette smoking leads to asthma in the respiratory system.
$(4)$ $A$ transplanted kidney in a patient can fail due to cell-mediated immunity.
$(5)$ Serum globulin is an antibody.

Match the Column-$I$ with Column-$II$ and select the correct option from the options given below:

Column-$I$ (Disease)	Column-$II$ (Pathogen)
$A$. Citrus canker	$P$. Protozoa
$B$. Malaria	$Q$. Fungi
$C$. Rust of wheat	$R$. Viroid
$D$. Bovine spongiform encephalopathy	$S$. Bacteria
	$T$. Prions

Identify the odd one out in the context of diseases.

Which of the following is mismatched?

Which of the following viruses is not transferred through the semen of an infected male?