... stands to parent as dead stands to ...
The answer in this case is 3. "child is an antonym of parent, alive is an antonym of death".
Problems with antonyms will often be slightly more subtle than the most common antonyms. Parent and child are a pair of words, just as above and below are a pair. The concept of "parent" implies that there is also a "child" and "above" implies that there is also a "below".