All the diseases are spread by housefly except

How was the 'good humor' hypothesis of health disproven?

Which of the following is/are inconsistent with a healthy individual?
$(1)$ Increased efficiency
$(2)$ Higher productivity
$(3)$ Increased longevity of people
$(4)$ Increase in infant and maternal mortality rates

In terms of chemical structure,an antigen is a type of .........

Match Column-$I$ with Column-$II$ and choose the correct option:-

Column-$I$	Column-$II$
$a.$ Pneumonia	$p.$ Rhino viruses
$b.$ Common cold	$q.$ Haemophilus influenzae
$c.$ Filariasis	$r.$ Microsporum
$d.$ Ringworm	$s.$ Wuchereria bancrofti

Assertion $A$: The spleen is a large reservoir of lymphocytes.
Reason $R$: The spleen acts as a filter of the blood by trapping blood-borne microorganisms.
Which option is correct for Assertion $A$ and Reason $R$?