'Teetotaller' is a person who
a. takes alcoholic drinks.
b. eats all kinds of food.
c. drinks too much.
d. abstains from alcoholic drinks.

The correct answer is Option D (d only).

Key Points:
• Concept: Vocabulary and One Word Substitutions.
• Explanation: A 'Teetotaller' is defined as a person who completely abstains from alcoholic beverages. Statement 'd' provides this exact definition.
• Other Options: Statements 'a', 'b', and 'c' describe drinkers or omnivores, which are opposite or unrelated.
• Option Match: Statement 'd' is located in Option 4 ('d only').
• Official Key: Option 4 ('d only') is the official correct answer.
• Key Takeaway: Remember: A 'Teetotaller' completely abstains from consuming alcohol.