Step 1: Recognise the analogy structure as "action leads to defining trait". The colon in "Charity : P" links an action word to the character trait of a person who commonly performs that action, and "Retaliation : Q" follows the exact same structure, so this is really two mini questions: what trait fits a charitable person, and what trait fits a person who retaliates.
Step 2: Test each full option pair together, since P and Q must both fit at once. Option (A): parsimonious means unwilling to spend or give, which contradicts the giving nature of charity, so this pair fails at P alone.
Option (B): altruistic reasonably fits charity, but amicable means friendly or peaceable, describing getting along with others rather than the act of retaliating, so this pair fails at Q.
Option (C): resentful means feeling bitter about being treated unfairly, which is not the trait of someone who performs charity, since it describes a person before retaliating rather than a giver of charity, so this pair fails at P.
Option (D): magnanimous means generous and forgiving, especially towards a rival, which fits a person who gives charity, and vindictive means driven by a desire for revenge, which fits a person who retaliates, so both halves of this pair work together correctly.
Step 3: Use an opposite meaning check as final confirmation. Charity and retaliation are opposite in spirit, giving versus revenge, and correspondingly magnanimous and vindictive are near opposite personality traits, forgiving versus revengeful, so the analogy is internally consistent only for option (D).
