Which of the following characteristics can be included in a healthy person?

Vaccines are prepared from which of the following?

Which diagnostic technique is based on antigen-antibody interactions?

Adult $Culex$ and $Anopheles$ can be distinguished with the help of:

$A$ combined solution of copper sulphate and calcium hydroxide which is used as a fungicide is

Which of the following three scientists were awarded the Nobel Prize in $1945$ for the discovery and development of penicillin?
$(i)$ Alexander Fleming
$(ii)$ Louis Pasteur
$(iii)$ Walther Flemming
$(iv)$ Ernst Chain
$(v)$ Howard Florey
$(vi)$ Oswald Avery