Identify $X$ and $Y$ from the following structure of an antibody molecule.

Match the following columns correctly.

Column-$I$	Column-$II$	Column-$III$
$(a)$ $Streptococcus$ $pneumoniae$	$(p)$ $3-7$ days	$(z)$ Common cold
$(b)$ $Salmonella$ $typhi$	$(q)$ $1-3$ weeks	$(x)$ Typhoid
$(c)$ $Rhinovirus$	$(r)$ $1-3$ days	$(y)$ Pneumonia

Identify the odd one out in the context of drugs.

Which is the particular type of drug that is obtained from the plant whose one flowering branch is shown here?

Read the following statements carefully and determine how many of them are correct.
$(1)$ Acquired immunity is characterized by memory.
$(2)$ The response provided by antibodies is $C.M.I.$
$(3)$ An exaggerated response of the immune system to certain antigens present in the environment is called allergy.
$(4)$ Innate immunity is antibody-dependent.
$(5)$ Dengue is a bacterial disease.

Identify the chemical structure given below.