Statements : No table is fruit. No fruit is window. All windows are chairs. Conclusions : I. No window is table. II. No chair is fruit. III. No chair is table. IV. All chairs are windows.

The correct answer is $\boxed{\text{B}}$. Only I and II follow.

The first statement is in the form of “No A is B”. This can be logically equivalent to the following statements:

• All A are not B.
• No B is A.

The second statement is also in the form of “No A is B”. This can be logically equivalent to the following statements:

• All A are not B.
• No B is A.

The third statement is in the form of “All C are D”. This can be logically equivalent to the following statements:

• No C is not D.
• All D are C.

We can use the above equivalences to derive the following conclusions:

• No window is table. (From the first statement and the second statement.)
• No chair is fruit. (From the first statement and the third statement.)

However, we cannot derive the following conclusions:

• No chair is table. (This is not necessarily true, since there could be objects that are neither chairs nor tables.)
• All chairs are windows. (This is not necessarily true, since there could be objects that are chairs but not windows.)

Therefore, the only conclusions that follow from the given statements are I and II.