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What is Which of the are the following contraindication for halothane used – and explain in detail?
Multiple exposures is the single most important factor for halothane hepatitis → Repeated use should be avoided, at least an interval of 3 months should be given between two exposures.
Obesity and middle age are risk factors for halothane hepatitis, but these are not contraindications.
Option 'd' requires specific mention here :-

          ♦Pre-existing liver disease or jaundice is not a contraindication :-
"There is no compelling evidence associating halothane with worsening of pre-existing liver disease".
__ Morgan 4th/e 169
"Pre-existing liver disease unrelated to halothane is not a contraindication to the use of halothane".
__ Lee 13th/e 143

Liver dysfunction & Jaundice to previous halothane exposure is a contraindication. Though not a contraindication, Halothane should be avoided in liver disease.