Q: The field of organic chemistry studies the structure and reactivity of compounds containing what element?


Read this paragraph and choose the correct option from the provided answers:

Since then, the distinction between organic and inorganic compounds and reactions has blurred. Currently, the field of organic chemistry studies the structure and reactivity of nearly all carbon-containing compounds. Over twenty million organic compounds are known, ranging from very simple molecules to complex proteins.

 Choices:

- nitrogen

- hydrogen

- oxygen

- carbon


A:
carbon