Solution:
The three abundant elements in the earth's crust are oxygen, silicon, aluminium. The mass-abundance of the nine most abundant elements in the Earth's crust is approximately: oxygen 46%, silicon 28%, aluminum 8.3%, iron 5.6%, calcium 4.2%, sodium 2.5%, magnesium 2.4%, potassium 2.0%, and titanium 0.61%. Other elements occur at less than 0.15%.

Solution:
In Small intestine of human body does maximum absorption of food take place. The small intestine or small bowel is an organ in the gastrointestinal tract where most of the end absorption of nutrients and minerals from food takes place.

Solution:
GATT (General Agreement on Tariffs and Trade) is international agreement signed in 1947 between non-communist nations with the object of encouraging and agreement which seeks to achieve its aim by arranging and encouraging bargaining with trade concession.

Solution:
Biennial meeting of the Commonwealth Heads of Government (CHOGM), Annual meeting of the finance minister of the member countries and Regular meeting of the minister of education, law, health and other minister are the important meeting of the Commonwealth.

Solution:
Mona Lisa was painted by Leonardo da Vinci in 1504 AD. Leonardo da Vinci is thought to have begun painting the Mona Lisa in 1503 or 1504 in Florence, Italy. Although the Louvre states that it was "doubtless painted between 1503 and 1506", the art historian Martin Kemp says there are some difficulties in confirming the actual dates with certainty.

Solution:
India participated in Olympics Hockey in 1928. The 1928 Olympics in Amsterdam, when India won the gold, was the country's first step towards ascending the hockey throne.

Solution:
The theory of utilitarianism was expounded by Jeremy Bentham (1748-1836), James Mill(1773-1839) and Henry Sidgwick (1838-1900). Utilitarianism is a normative ethical theory that places the locus of right and wrong solely on the outcomes (consequences) of choosing one action/policy over other actions/policies.