Explanation:

Let’s go through this step by step:

- The question: Given a sphere of radius 20 m emptied into an inverted square pyramid, what is the pyramid's altitude?

- Statement I: The centre of the pyramid lies on the altitude.

- Honestly, this is just a geometry fact—basically says the pyramid is regular/symmetrical.

- It gives us no relationship to the sphere's volume, base, or the altitude.

- Statement II: The distance of the surface of the liquid from the square base of the pyramid is [incomplete info].

- Problem: We don’t know what this “distance” is.

- Doesn’t give us the relationship between sphere volume, pyramid base, or altitude, unless the value is given (which it isn’t).

Now, the options:

- 1: Only one statement is enough (not true—neither gives us what we need).

- 2: Either is enough on its own (also false).

- 3: Both together solve it (no; together, they still don’t give us the missing measures).

- 4: Even with both, we can’t answer it.

Here’s the kicker: With just geometry and no numbers connecting the two (like pyramid base size or height after pouring), you can’t work out the altitude at all.

Correct Answer: Option 4-4