The question is testing a simple fact about the origin of one named nursery raising method used in rice cultivation, the Dapog method.
- Myanmar: a major rice growing country, but it is not the source credited for the Dapog technique in Indian agronomy textbooks.
- Japan: known for its own mat type nursery used with mechanical transplanters, but this is a separate tradition from the Dapog method.
- China: also a leading rice grower, yet not the origin point named for this particular soil-less mat nursery.
- Philippines: home to the International Rice Research Institute (IRRI), which developed the Dapog technique of raising a thin, rollable seedling mat on a raised bed lined with leaves or polythene, later adopted in India.
Because IRRI is located in the Philippines and developed this exact nursery raising package, the correct source country is the Philippines, option (4).
Let's summarize:
- Dapog nursery uses pre-germinated seed on a thin bed, ready to transplant in about 12 to 14 days.
- Its origin traces to IRRI, based in the Philippines.
So the answer is the Philippines, option (4).