You have chosen 'The Sign of Four' by Arthur Conan Doyle, 'The Ultimate Constituents of Matter' by Bertrand Russell and 'Anthropological Studies of Classification' by Roy Ellen
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| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
| F. | Chemistry | |
| G. | Biology |