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The majority of improved Indian Rice varieties have arisen from a cross between
A. Oryza sativa indica × Oryza nivara
B. Oryza sativa indica × O. sativa japonica
C. O. sativa japonica × O. nivara
D. O.rufipogon × O.nivara

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Last updated date: 13th Jun 2024
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Answer
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Hint: The ranchers are developing world record measures of rice with no GM and no herbicide in a town of our country's most unfortunate Bihar state. Most of the people from this state were helpless before the sporadic climate and used to abandoning food in awful years. When India's driving rice researchers mumbled about monstrosity results, the Bihar state farming colleges did not trust them from the outset.

Complete answer:
Oryza sativa (rice) is a monocotyledonous blooming plant of the family Poaceae. It is one of the most significant yield plants on the planet, giving the essential food source to half of the total population.
Oryza sativa subsp. japonica is one of three significant subspecies of rice, the others being indica and javanica. Oryza sativa subsp. japonica is short-grained and high in amylopectin with the goal that the grains remain together when cooked, which recognizes it from subsp. indica, which is for some time grained and not clingy.
Oryza sativa contains two significant subspecies: the sticky, short-grained japonica or sinica assortment, and the non-clingy since quite a while ago grained indica rice assortment. Rice happens in a variety of tones, including white, earthy colored, dark, purple, and red rice.
Hence, Option (B) Oryza sativa indica × O. sativa japonica is the correct answer.

Additional Information:
Oryza nivara is a wild forebear of the developed rice Oryza sativa. It is discovered filling marshy territories, at the edge of lakes and tanks, alongside streams, in the trench, in or around rice fields.
O. sativa has a diphyletic root, and the two subspecies, specifically, O. sativa var. indica and O. sativa var japonica ecotype in calm districts, are O. Sativa genetic supplies may not be clarified by proposed starting points from O. nivara.
Oryza rufipogon, known as brown beard rice, wild rice, and red rice, is an individual from a variety of Oryza. It is local to East, South, and Southeast Asia.

Note: Oryza sativa is a sort of grass, which develops best when lowered in the water. It fills in upland regions, inundated regions, rainfed swamp zones, and flood-inclined zones. Rice is exceptionally versatile and can be served even in differing conditions. Japonica rice once in a while called Sinica rice is one of the two significant homegrown assortments of Asian rice. Japonica rice is broadly developed and burned-through in China, Japan, and Korea, though in most different areas, indica rice is the predominant sort of rice.