Correct Answer - Option 3 : Only II follows
The least possible Venn diagram for the given statements is as follows:
DIAGRAM
Conclusions:
I. Some went is exit → False (It is possible but not definite).
II. All exit is entry is a possibility → True (As only a few entry is exit, some entry is exit and some entry is not exit, so it is possible that all exit is entry). The possibility case is as follows:
DIAGRAM
III. Some went is not exit → False (It is possible but not definite).
Conclusion I and III form a complementary pair of some and some not which is a complementary pair of neither-nor case.
NOTE: Complementary pairs for neither-nor case are:
Some + Some not and No + All.
Hence,
only conclusion II follows.