Match the following.
| List-I | List-II |
| a. Aldo Leopold | 1. Animal liberation |
| b. Arne Naess | 2. Deep green |
| c. Peter Singer | 3. Land ethics |
| d. Richard Sylan | 4. Deep ecology |
A. a-2, b-4, c-3, d-1
B. a-4, b-3, c-2, d-1
C. a-3, b-2, c-1, d-4
D. a-3, b-4, c-1, d-2
Answer: Option D

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