All organic compounds contain what elements

All organic compounds generally contains carbon. In some compounds carbon is combined with hydrogen or oxygen.

Explanation:

Organic compounds are referred to as those compounds which contains carbon as the main element. Carbon has an unique ability to form numerous variety of chains with other carbon element. Hence, giving rise to large number of organic compounds. The study dealing with organic compounds, its characteristics and methods of preparations are often known as organic chemistry. Organic compounds also comprises of hydrogen, oxygen or nitrogen forming various types and forms of organic compounds, as for example, methane, ethanol.

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the answer is d. chordata