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Which of the following is an isolate ?

  • A.History
  • B.India
  • C.Medicine
  • D.Law

Answer: B

The isolate is India.

In Ranganathan's facet analysis an isolate is a component of a subject that is not itself a subject, such as a space, time or common isolate. India is a space isolate: it qualifies a subject, as in 'History of India' or 'Agriculture in India', but is not a field of study by itself.

History, Medicine and Law are basic subjects (main classes in the Colon Classification), not isolates. They form the base to which isolates are attached, so none of them answers the question.

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