1. Brahmaputra is the widest river in India.

2. The Brahmaputra River originates as Siang or Dihang from the Chemayungdung glacier of the Kailash range near Lake Manasarovar.

3. It enters India from the west of Sadiya town in Arunachal Pradesh.

Tributaries: Dibang, Lohit, Siang, Budhi Dihing, Tista and Dhansiri.

4. The average width of the Brahmaputra valley is about 80 kilometres.

5. The main river of the valley, the Brahmaputra is one of the largest rivers in the world and ranks fifth in terms of its average runoff.

6. Namcha Barwa is a mountain peak in the Tibetan Himalayas with an altitude of 7757 meters. Tsangpo - The Brahmaputra river takes a U-turn on reaching Namcha Barwa and enters India in Arunachal Pradesh through a narrow valley.

7. The Himalayas extend in the east-west direction from the Indus Valley in the west to the Brahmaputra Valley in the east.

Answer: C) Norway Explanation: The case where there is 6 months day, and 6 months night could only happen on poles because The Earth is tilted on its axis. The pole which is away (opposite direction of sun) from the Sun remains in complete darkness till it comes in front of the sun. So we conclude that, countries at the poles have 6 months day, and 6 months night. So countries close to these region have such cases like, Alaska, Antarctica, Norway etc. Norway, the northernmost inhabited region of Europe, there is no sunset from approximately 19 April to 23 August. The extreme sites are the poles, where the sun can be continuously visible for half the year. The North Pole has midnight sun for 6 months from late March to late September.

Answer: C) Fluorescent Blue Explanation:

Asia's largest sugar mill is located in Khatouli, Muzaffarnagar district of Uttar Pradesh. The Triveni Sugar Mill in Khatouli is the largest in Asia in terms of production and storage capacity. The mill has been operational since 1933. 

The first round table conference was conducted from 12 November 1930 to 19 January 1931. Majority of the leaders from the Indian National Congress could not participate in this conference due to Gandhi's Civil Disobedience movement. However, the results obtained from the 1st round table conference were minimal.