The correct sequence of taxonomic study of a newly discoverd organism is a) First classification then identification, nomenclature and characterisation b) First identification then classifying organism and then characterisation and nomenclature c) First nomenclature then characterisation, identification and classification d) First characterisation then identifation and classification and then nomenclature plz. give the correct answer with reason

The most appropriate answer is d)
However, I would like clear you that nomenclature comes before classification. Thus no option is exactly correct.
First step of taxonomy is characterisation. In this step all the features or characteristics of organism to be identified are noted down and described .
Organisms with some set of specific characteristics are matched with an already known organism. This step is called identification. Then comes nomenclature and classification.   

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