Bamboo drip irrigation is prevalent in Meghalaya.

Explanation:
1. Bamboo drip irrigation method: Bamboo drip irrigation is a method of irrigation where water is supplied to the plants through bamboo pipes. It is an efficient and cost-effective way of irrigation, especially in areas with limited water resources.

2. Prevalence in Meghalaya: Meghalaya is a state in northeastern India known for its abundant rainfall and hilly terrain. This makes it suitable for the adoption of bamboo drip irrigation. The method has been widely implemented in Meghalaya to address the water scarcity issues faced by farmers in the region.

3. Reasons for prevalence in Meghalaya:
- Topography: Meghalaya's hilly terrain makes it challenging to implement traditional irrigation methods. Bamboo drip irrigation, with its simplicity and flexibility, can be easily adapted to the terrain, allowing farmers to efficiently irrigate their crops.
- Water conservation: Meghalaya experiences heavy rainfall, but water scarcity can still be an issue during the dry seasons. Bamboo drip irrigation helps in conserving water by delivering it directly to the plants' root zones, reducing water wastage.
- Cost-effectiveness: Bamboo, being a locally available and renewable resource in Meghalaya, makes it an affordable option for constructing irrigation systems. Farmers can easily obtain bamboo and construct the drip irrigation setup without incurring significant expenses.
- Environmental sustainability: Bamboo is a sustainable and eco-friendly material. Its use in drip irrigation aligns with the state's focus on sustainable agricultural practices and conservation of natural resources.

4. Other states: While bamboo drip irrigation may also be adopted in other states, the question specifically asks for the prevalent state. Based on the given options, Meghalaya is the correct answer.

In conclusion, bamboo drip irrigation is prevalent in Meghalaya due to its suitability for the region's topography, water conservation benefits, cost-effectiveness, and environmental sustainability.

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