86: Important oilfields of the Brahmaputra Valley include
(a) Digboi and Kilboi
(b) Lunej and Ankhleshwar
(c) Badarpur and Masimpur
(d) Naharkatia and Moran
87: Which of the following is not a seed-borne disease?
(a) Brown leaf spot of rice
(b) Black arm of cotton
(c) Red rot of sugarcane
(d) Potato mosaic
88: India's contribution to Mathematics includes:
1. Number system
2. Decimal system
3. Concept of zero
(a) 1, 2 & 3
(b) 1 & 2
(c) 2 & 3
(d) 1 & 3
89: Which one of the following is not an essential micronutrient for plants ?
(a) Boron
(b) Zinc
(c) Sodium
(d) Copper
90: In India, the first Municipal Corporation was set up in which one among the following?
(a) Calcutta
(b) Madras
(c) Delhi
(d) Bombay