बिहार की सबसे महत्वपूर्ण फसल, चावल (धान) की खेती किन तीन विशिष्ट मौसमों के दौरान की जाती है?

Which of the following combination of food crops represents the major agricultural crops grown in Bihar?

Consider the following statements regarding the climatic and mechanical challenges associated with the agriculture sector in Bihar: I. The climatic challenges in Bihar are characterized by regional disparities, with North Bihar being prone to floods and South Bihar being susceptible to drought. II. The mechanical capabilities of the sector are hindered by low mechanization, a challenge intertwined with the prevalence of subsistence farming and small landholdings averaging less than one hectare. III. The state has completely overcome its dependence on the monsoon for crop cultivation, achieving 100% irrigation coverage across its net sown area. IV. The Mukhya Mantri Harit Krishi Sanyantra Yojana is a specific initiative aimed at addressing mechanical limitations by providing subsidized farm machinery. Which of the statements given above are correct?