What shape has 4 vertices 6 edges and 6 faces?

Answer 1

No shape does.

Euler's Formula (vertices + faces = edges + 2) holds true for all shapes.

For the given figures, this means:

4 + 6 = 6 + 2 → 10 = 8

but 10 ≠ 8, so the combinations of 4 vertices, 6 edges and 6 faces given does not represent a shape.