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

$A$: Antibiotics like penicillin can be used to treat common cold.
$R$: Penicillin causes lysis of viral cells.

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

The enlargement of the spleen during malaria is caused by:

Psychosis is characterised by

Read the following statements carefully and identify the correct statements:
$(1)$ $TAB$ vaccine is used in typhoid.
$(2)$ Thymus is known as the $Training$ $School$ for $T$-lymphocytes.
$(3)$ Myasthenia gravis is an autoimmune disease.
$(4)$ Exaggerated response of the body to carcinogens is called allergy.
$(5)$ Turner's syndrome arises due to sex chromosome abnormality in females.