The National Forest Policy of 1988 focuses on the sustainable management and conservation of forests in India. Let`s evaluate each program mentioned in the options and determine which ones are included in the policy.

I. Afforestation and development of wastelands: Afforestation refers to the process of establishing forests in areas where there were no forests previously. It involves planting trees and creating forest cover. Development of wastelands involves reclaiming and restoring degraded or barren lands to make them suitable for afforestation. This program aligns with the goals of the National Forest Policy, as it aims to increase the forest cover and combat deforestation.

II. Reforestation and replantation in existing forests: Reforestation involves replanting trees in areas that have been deforested or have lost their tree cover. Replantation specifically focuses on replacing trees within existing forests that have been removed due to logging or natural causes. These activities are essential for maintaining the ecological balance and productivity of forests, and they contribute to the conservation objectives of the National Forest Policy.

III. Encouraging the wood substitutes and supplying other types of fuel: This program emphasizes the need to reduce dependence on wood as a fuel source and promote alternatives. The National Forest Policy recognizes the importance of sustainable fuelwood management to prevent overexploitation of forests. Encouraging the use of wood substitutes and other types of fuel helps conserve forests by reducing the pressure on wood resources.

IV. Promotion of wide use of insecticides and pesticides to restrict the loss of forest area from degradation caused by pests and insects: This statement suggests using chemical interventions to control pests and insects in forests. However, the National Forest Policy of 1988 does not promote the wide use of insecticides and pesticides. Instead, it emphasizes the importance of maintaining a balanced ecosystem and preserving biodiversity within forests. The policy encourages the adoption of integrated pest management practices that minimize the use of chemicals and prioritize natural pest control methods.

Based on the evaluation of each program, the correct answer is Option 4: I, II, and III. These three programs align with the objectives and principles outlined in the National Forest Policy of 1988, promoting afforestation, reforestation, sustainable fuelwood management, and the use of wood substitutes to conserve forests and ensure their long-term sustainability.