Cigarette : Tobacco :: ?

Options

A. Coffee : Caffeine
B. Milk : Bottle
C. Cigar : Filter
D. Shoes : Socks

Explanation

To solve the analogy question "Cigarette : Tobacco :: ?", we need to identify the relationship between the first pair and apply it to find the second pair.

### Step-by-Step Solution:

1. **Identify the Relationship in the First Pair**:
- The first pair is "Cigarette : Tobacco".
- Here, tobacco is the main component or prime constituent of a cigarette. Without tobacco, a cigarette cannot exist as it is the primary substance that defines it.

2. **Analyze the Options**:
- We need to find a pair where the second term is the main component or prime constituent of the first term.
- The options provided are:
- A. Coffee : Caffeine
- B. Milk : Bottle
- C. Cigar : Filter
- D. Shoes : Socks

3. **Evaluate Each Option**:
- **Option A (Coffee : Caffeine)**: Caffeine is the main component of coffee, similar to how tobacco is the main component of a cigarette. This option maintains the same relationship.
- **Option B (Milk : Bottle)**: A bottle is a container for milk, but it is not a component of milk itself. This does not fit the relationship.
- **Option C (Cigar : Filter)**: A filter is not a component of a cigar. This option does not fit the relationship.
- **Option D (Shoes : Socks)**: Shoes and socks are worn together, but socks are not a component of shoes. This does not fit the relationship.

4. **Conclusion**:
- The only option that maintains the same relationship as "Cigarette : Tobacco" is "Coffee : Caffeine".
- Therefore, the answer is **A. Coffee : Caffeine**.

### Final Answer:
**Coffee : Caffeine**