The correct option is A-2, B-4, C-1, D-3
Explanation
Natural resources are categorized based on their origin and utility. Forest products include materials derived from trees and plants, classified as timber and non-timber forest products (NTFPs). Fossil fuels and their derivatives are extracted from the earth's crust and are distinct from forest produce.
Detailed Analysis:
- A. Timber (Matches with 2. Construction Material): Timber refers to wood processed into beams and planks. It is a major forest product extensively used as a structural material in construction, carpentry, and furniture making.
- B. Neem (Matches with 4. Medicinal Plant): Azadirachta indica (Neem) is a tree native to the Indian subcontinent. It is widely recognized for its therapeutic properties, including antibacterial and antifungal effects, making it a significant medicinal plant.
- C. Gum (Matches with 1. Plant Secretion): Natural gums are polysaccharides obtained as exudates (secretions) from the stems or branches of trees (such as Acacia) often in response to injury. They are classified as non-timber forest products.
- D. Kerosene (Matches with 3. Non-forest Product): Kerosene is a combustible hydrocarbon liquid derived from the fractional distillation of petroleum. It is a fossil fuel derivative and is not a product of the forest ecosystem.
Key Takeaway: Forest resources are broadly divided into timber and non-timber products (such as gums, resins, and medicinal plants), whereas petroleum-based fuels like kerosene are non-forest, mineral-based resources.