How many of the following diseases can be classified as autoimmune diseases?
Rheumatoid arthritis,Myasthenia gravis,$AIDS$,$SCID$,Vitiligo,Hashimoto's disease,Multiple sclerosis,Cancer,Type-$I$ diabetes.

How does the transmission of each of the following diseases take place?
$(a)$ Amoebiasis
$(b)$ Malaria
$(c)$ Ascariasis
$(d)$ Pneumonia

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.

The common cold differs from pneumonia in that:

Match the following columns:

Column-$I$	Column-$II$
$1.$ Typhoid	$a.$ Trichophyton
$2.$ Pneumonia	$b.$ Rhinovirus
$3.$ Common cold	$c.$ Haemophilus influenzae
$4.$ Ringworm	$d.$ Salmonella typhi

Which of the following diseases are $NOT$ related to smoking?
$(1)$ Lung cancer $(2)$ Bronchitis $(3)$ Emphysema $(4)$ Coronary heart disease $(5)$ Gastric ulcers $(6)$ Bladder cancer $(7)$ Throat cancer