Let x and y be two variables with variance as 1990 and

 Leprosy, also known as Hansen’s disease, is a chronic  disease caused by

When was the H5N1 virus, which causes bird flu, first discovered?

Which one of the following is written by “Varahamihir?”

Which phylum does "Fasciola," a type of flatworm, belong to?

What is the primary use of propolis, a resinous substance produced by honeybees?

Which disease is caused by bacteria?

The size of the pupil of the eye is controlled by which part?

Which is the largest organ in the human body?

India is permanent member of ILO Governing Body since: 

Which vein carries oxygen-rich blood from the lungs to the heart?