Cube : Cuboid :: ?:?

Options

A. Oval : Sphere
B. Square : Cube
C. Sphere : Ellipsoid
D. Triangle : Cone

Explanation

To solve the analogy "Cube : Cuboid :: ?:?", we need to identify the relationship between the first pair (Cube and Cuboid) and apply that same relationship to find the second pair.

### Step-by-Step Solution:

1. **Understand the Relationship**:
- A cube is a three-dimensional shape where all sides are equal.
- A cuboid is also a three-dimensional shape, but its sides can be of different lengths. It can be considered as an elongated form of a cube.

2. **Identify the Options**:
- Option 1: Oval or Square
- Option 2: Square and Cube
- Option 3: Sphere and Ellipsoid
- Option 4: Triangle and Cone

3. **Analyze Each Option**:
- **Option 1 (Oval or Square)**: An oval is an elongated form of a circle, and a square is a 2D shape. This does not match the 3D relationship we are looking for.
- **Option 2 (Square and Cube)**: A square is a 2D shape, while a cube is a 3D shape. They differ in dimensions, so this option does not fit.
- **Option 3 (Sphere and Ellipsoid)**: A sphere is a perfectly round 3D shape, and an ellipsoid is an elongated form of a sphere. This matches the relationship we are looking for.
- **Option 4 (Triangle and Cone)**: A triangle is a 2D shape, and a cone is a 3D shape. Similar to option 2, they differ in dimensions.

4. **Select the Correct Option**:
- Based on the analysis, the correct answer is **Option 3: Sphere and Ellipsoid**, as it maintains the same relationship as Cube and Cuboid.

### Final Answer:
**Sphere : Ellipsoid**