What is Louis Pasteur famous for?

What are the factors that affect our health?

Triazines are derived from

What causes Alzheimer's disease in humans?

Select the correct option to fill up the blanks.
$(i)$ Diseases which are easily transmitted from one person to another,are called $.....$ diseases.
$(ii)$ In human body,parasite of malaria initially multiplies within the $........$ and then attack the $......$
$(iii) ......$ is the yellowish fluid secreted by mother during the initial days of lactation.
$(iv) ......$ and $.......$ are the primary lymphoid organs.

What is a broad-spectrum antibiotic? Name one such antibiotic.