Which of the following drugs are used to help patients suffering from mental illnesses like depression and insomnia?

What does the part labeled '$A$' in the given figure represent?

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.

Match the correct pairs:

Column $1$	Column $2$
$(i)$ Salmonella typhi	$(p)$ Malaria
(ii) Plasmodium	$(q)$ Typhoid
(iii) Entamoeba histolytica	$(r)$ Ringworm
(iv) Epidermophyton	$(s)$ Amoebiasis

Read the statements carefully and determine how many statements provide correct information.
$(1)$ In innate immunity,the cellular barrier is represented by four main types of cells.
$(2)$ The $BCG$ vaccine contains live attenuated Mycobacterium.
$(3)$ In $G-6-P$ dehydrogenase deficiency,$RBCs$ start to disintegrate (hemolysis).
$(4)$ Nicotine stimulates the adrenal gland.

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