This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

When the GHMC was created in 2007, the area occupied by the municipality increased from 175 km2 (68 sq mi) to 650 km2 (250 sq mi). Consequently, the population increased by 87%, from 3,637,483 in the 2001 census to 6,809,970 in the 2011 census, 24% of which are migrants from elsewhere in India,:2 making Hyderabad the nation's fourth most populous city. As of 2011[update], the population density is 18,480/km2 (47,900/sq mi). At the same 2011 census, the Hyderabad Urban Agglomeration had a population of 7,749,334, making it the sixth most populous urban agglomeration in the country. The population of the Hyderabad urban agglomeration has since been estimated by electoral officials to be 9.1 million as of early 2013 but is expected to exceed 10 million by the end of the year. There are 3,500,802 male and 3,309,168 female citizens—a sex ratio of 945 females per 1000 males, higher than the national average of 926 per 1000. Among children aged 0–6 years, 373,794 are boys and 352,022 are girls—a ratio of 942 per 1000. Literacy stands at 82.96% (male 85.96%; female 79.79%), higher than the national average of 74.04%. The socio-economic strata consist of 20% upper class, 50% middle class and 30% working class.
What was the area of Hyderabad before the GHMC?

Gaddafi was notably confrontational in his approach to foreign powers, and generally shunned western ambassadors and diplomats, believing them to be spies. He once said that HIV was "a peaceful virus, not an aggressive virus" and assured attendees at the African Union that "if you are straight you have nothing to fear from AIDS". He also said that the H1N1 influenza virus was a biological weapon manufactured by a foreign military, and he assured Africans that the tsetse fly and mosquito were "God's armies which will protect us against colonialists". Should these 'enemies' come to Africa, "they will get malaria and sleeping sickness".
What sort of virus did Gaddafi describe HIV as?

Archaeology is the study of the human past through its material remains. Artifacts, faunal remains, and human altered landscapes are evidence of the cultural and material lives of past societies. Archaeologists examine these material remains in order to deduce patterns of past human behavior and cultural practices. Ethnoarchaeology is a type of archaeology that studies the practices and material remains of living human groups in order to gain a better understanding of the evidence left behind by past human groups, who are presumed to have lived in similar ways.
What field studies human's past through material remains?