26: Consider the following statements:
1. Agricultural soils release nitrogen oxides into environment.
2. Cattle release ammonia into environment.
3. Poultry industry releases reactive nitrogen compounds environment.
Which of the statements given above is/arc correct?
(a) 1 and 3 only
(b) 2 and 3 only
(c) 2 only
(d) 1, 2 and 3
27: Who was the Speaker of the first Lok Sabha ?
(a) G. V. Mavalankar
(b) K. M. Munshi
(c) Hukam singh
(d) U. N. Dhebar
28: Maximum production of paddy per unit water consumption can be best achieved in a:
(a) Non-porous soil
(b) Porous soil
(c) Impervious soil
(d) Soil that allows slow percolation
29: Which one of the following can be classified as a 'Pratiloma Marriage'?
(a) A Brahmin girl marrying a Sudra boy
(b) A Sudra girl marrying a Brahmin boy
(c) A Brahmin girl marrying a Brahmin boy
(d) None of these
30: Monazite is an ore of
(a) zirconium
(b) thorium
(c) titanium
(d) iron