Explanation:

Known as devout and serious person, she also has good sense of humour.
The rule of thumb is that good is an adjective and well is an adverb. Good modifies a noun; something can be or seem good. Well modifies a verb; an action can be done well. However, when you're talking about health, well can be used as an adjective. The clue word here “also”.
Hence, option 3 is the correct answer.