Answer: A) bland : flavorful.
Explanation: an analogy is a comparison between one thing and another, usually with the purpose of explanation or clarification, this comparison is based on one similarity or difference between specific features of two things. The relation between the given pair of words "ruthless" and "compassionate" is that they are antonyms. From the given options, the pair of words that has the same relation is the corresponding to option A "bland" and "flavorful" are also antonyms.