41. Which of the following states does not share border with Assam ?
A
Nagaland
B
Sikkim
C
Mizoram
D
West Bengal
Detailed Explanation
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Sikkim does not share a border with Assam. Assam shares interstate boundaries with Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya and West Bengal.
44. Which of the following river is on the south bank of River Brahmaputra ?
A
Manas
B
Subansiri
C
Dikhow
D
Ranganadi
Detailed Explanation
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Dikhow is a tributary on the south bank of the Brahmaputra in Assam. Manas, Subansiri and Ranganadi are associated with the north-bank tributary system.
45. Which one amongst the following is the oldest production unit ?
A
Digboi Refinery
B
Numaligarh Refinery
C
Bongaigaon Refinery
D
Guwahati Refinery
Detailed Explanation
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Digboi Refinery is the oldest among the listed refinery units. Digboi is associated with India's earliest commercial oil production and refining history; the refinery dates to 1901.
Guru Tegh Bahadur, the ninth Sikh Guru, visited Dhubri in the 17th century and is associated with establishing the historic Gurdwara there. Guru Nanak had also visited the region earlier.