Given below are two statements followed by two conclusions. Assuming these statements to be true, decide which one logically follows.
$\text{Statements:}$
- No manager is a leader.
- All leaders are executives.
$\text{Conclusions:}$
- No manager is an executive.
- No executive is a manager.
- Only conclusion I follows
- Only conclusion II follows
- Neither conclusion I nor II follows
- Both conclusions I and II follow