Explanation:

Correct answer is (d). In the given statements, statement II states India’s strength as a major agricultural nation with a large poultry industry and statement II discusses what India has done to deal with avian influenza.
Applying the elimination technique, let’s check the relevance of each of the options one by one.
Possibility 1.
Although India has implemented an action plan formulated by the Centre’s Department of Animal Husbandry, Dairying and Fisheries to deal with avian influenza, it is a major agricultural nation with a large poultry industry. Or Although India is a major agricultural nation with a large poultry industry, it has implemented an action plan formulated by the Centre’s Department of Animal Husbandry, Dairying and Fisheries to deal with avian influenza. We can observe that neither of the above two formations expresses a meaningful context. This eliminates option A.
Possibility 2.
As a major agricultural nation with a large poultry industry, India has implemented an action plan formulated by the Centre’s Department of Animal Husbandry, Dairying and Fisheries to deal with avian influenza. Clearly, the above synthesis is both grammatically and contextually correct and keeps the flow of the sentence intact.
Possibility 3.
Being a major agricultural nation with a large poultry industry, India has implemented an action plan formulated by the Centre’s Department of Animal Husbandry, Dairying and Fisheries to deal with avian influenza. Evidently, the above synthesis is also both grammatically and contextually correct and coherent.
Option D is hence the correct answer.