Which element is not part of nitrogenous basea) phosphorusb) carbonc)nitrogend)oxygen 

Phosphorus is not part of a nitrogenous base.

A nitrogenous base is a nitrogen containing organic molecule that possess the same chemical properties as a base. These are particularly important since its main property is to bond the nucleic acids together. These also make up the building blocks of DNA and RNA.

it would be rhyolitic hope this