Answer: D) China and England Explanation: The Opium Wars were two wars in the mid-19th century involving Anglo-Chinese disputes over British trade in China and China’s sovereignty. The disputes included the First Opium War (1839–1842) and the Second Opium War (1856–1860).

Answer: D) Karnataka Explanation: Kunchikal falls of India is of height 1493 ft is in Karnataka state of the river Varahi.

Answer: B) 16 Explanation: Let the third proportion to 9 & 12 be 'x'. => 9:12 = 12 :p => p = 12x12/9 = 16.

Answer: C) Romans Explanation: Romans (753 BC - AD 410) began public health and sanitation systems.   Romans established the first public health and sanitation systems by building sewers and aqueducts. They also treated diseases with diet, exercise and meditation.

A cold or flu illness.

Answer: A) getting information into memory. Explanation: Encoding refers to the getting information into memory.

Answer: B) very detailed reports Explanation: Managerial accounting is the process of identifying, measuring, analyzing, interpreting and communicating information for the pursuit of an organization's goals. This branch of accounting is also known as cost accounting.   Hence, the distinguishing feature of managerial accounting is very detailed reports.

Answer: B) 5 m/h Explanation: As the distance travelled is constant, the time taken is inversely proportional to speed. Let 'u' be the speed of the current and 'v' be the speed of the boat. Speed of the boat downstream = v + u & upstream = v - u => v+u/v-u = 30/20 => v/u = 5 => v = 5u => v + u = 6u = 10/20/60 miles/hr => 6u = 30 m/h => u = 5 m/h