Correct option is B
• Rachel Carson is the author of Silent Spring (IV), a pivotal environmental science book.
• Humphry Davy authored Elements of Agricultural Chemistry (I), a foundational work in soil and plant chemistry.
• Theophrastus is known for Natures of Plant (II), contributing to early botanical science.
• S. Buol contributed to Soil Genesis and Classification (III).
Hence, correct matching is: A–IV, B–I, C–II, D–III.