Gerontology is the study of the social, psychological, cognitive and biological aspects of aging. Oncology is the branch of medical science that deals in treating people suffering from cancer. Teratology is the study of abnormalities of physiological development. Ornithology is a branch of zoology that is related to the study of birds.

Blood perform many important functions within the body including supply of oxygen to tissues (bound to hemoglobin, which is carried in red cells), the supply of nutrients such as glucose, amino acids and fatty acids.

Pairs is correctly matched as such- 
Silver Iodide – Artificial rain 
Silver Chloride – Horn Silver 
Zinc Phosphide – Rat poison 
Zinc Oxide – Philosopher’s wool

When we see an object, the image formed on the retina is real and inverted.

Dev samaj, a religious and social reform society, was founded on 16 February 1887 in Lahore by Pandit Shiv Narayan Agnihotri.

In 1742, Swedish astronomer, Anders Celsius invented the Celsius(Centigrade) temperature scale, which was named after the inventor.

Qatar has committed that it will introduce a minimum wage for workers in the country. The announcement was made by labour and social affairs minister Issa Saad al-Jafali al-Nuaimi. The announcement came a day before a meeting of the UN’s International Labour Organisation (ILO

In India , the period between 1991 to 2003 is termed as Golden Revolution. Golden revolution is about Honey and Horticulture production. During this period there is huge production of fruits, vegetables ,honey and other horticulture products.

Newton's First Law of Motion states that a body at rest will remain at rest unless an outside force acts on it, and a body in motion at a constant velocity will remain in motion in a straight line unless acted upon by an outside force.

Colour blindness is a sex-linked genetic disorder. It does not relate to vitamin D. The deficiency of Vitamin A causes night blindness. Vitamin B3 is also called niacin. Its deficiency causes pellagra. The deficiency of folic acid causes anaemia.