$$∠BOC =90°-{∠A\over2}$$

Answer: C) 20th March Explanation: The International Day of Happiness (known as Happiness Day) is celebrated throughout the world on the 20th of March. The International Day of Happiness was founded on June 28, 2012, by the United Nations General Assembly when all 193 member states unanimously adopted UN resolution 66/281. It was celebrated for the first time in 2013.

Answer: A) 360 ft Explanation: A 360-foot-high (110 metres) flag post, said to be the country's tallest, was inaugurated at the Indo-Pak Attari Border, just a stone's throw from Pakistan. Punjab Minister Anil Joshi inaugurated the country's largest tricolour on the tallest flag post - measuring 110 metres in length, 24 metres in width and 55 tons in weight. Built at an approximate cost of Rs 3.50 crore, the post was a project of the Amritsar Improvement Trust Authority of the Punjab Government.