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.

Read the following statements carefully and determine how many statements are correct?
$(1)$ Typhoid typically has an incubation period of $1-3$ weeks.
$(2)$ The fungus $Pneumocystis$ is responsible for causing pneumonia in $AIDS$ patients.
$(3)$ Sudden withdrawal of addictive substances leads to withdrawal syndrome.
$(4)$ In cancer,all treatments can be given simultaneously.
$(5)$ Athletes use steroids to enhance their performance.

Assertion $A$: Common cold is an infectious disease caused by rhinoviruses.
Reason $R$: The common cold typically lasts for $3$ to $7$ days.
Which option is correct for Assertion $A$ and Reason $R$?

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 diseases in Column $I$ with the type of microbe causing them in Column $II$.

Column $I$	Column $II$
$i$. Elephantiasis	$a$. Virus
$ii$. Typhoid	$b$. Nematode parasite
$iii$. Dermatophytosis	$c$. Gram -ve bacteria
$iv$. Dengue	$d$. Protist
$v$. Malaria	$e$. Fungus

Choose the correct option.

Consider the given statements and select the true ones $:-$
$(A)$ Health could be defined as a state of complete physical,mental and social well-being.
$(B)$ Pathogens can enter our body by various means,multiply and never interfere with the functions of organs/organ systems.
$(C)$ Salmonella typhi is a pathogenic virus which causes typhoid fever.
$(D)$ Plasmodium reproduces asexually in liver cells and $\text{RBC}$ of human.