In the question, one sentence is given and four words are given in bold denoted by (A), (B), (C) and (D). You have to decide which of the following is inappropriate in context. If all the words are appropriate in the context then mark ‘All correct’ as your answer.

In 19th-century psychiatry, monomania was a form of partial (A) insanity conceived (B) as single pathological (C) preoccupation in an otherwise sound (D) mind.