Based on the two parts of the word "autonomy", which of the following definitions is correct?

Name: Based on the two parts of the word "autonomy", which of the following definitions is correct?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The correct meaning of "autonomy" is self-government. "Auto-" means self and "-nomy" means govern.
An organism capable of synthesizing its own food is called an "autotroph". 
Something that operates without external control is called "automatic".
A person's signature is called an "autograph".

Based on the Two Parts of the Word "Autonomy", Which