No football player plays hockey – It is not correct. No way we can combine diagrams 1 and 2 to get a diagram for this statement.

Some football players play hockey – It is correct from the above reasoning. In whichever way we combine the Venn diagrams of the given two statements we’ll get an intersection for Football and Hockey.

All football players play hockey – It can be true but not always and the counterexample is shown in the below Venn diagram which can be obtained by combining the Venn diagrams for the given statements.

All hockey players play football – It also can be correct but not always. The counterexample shown in the above Venn diagram for option C works here as well.