Data Sufficiency - General Questions

I alone is sufficient, but II alone is not

II alone is sufficient, but I alone is not

Either I or II alone is sufficient

Neither I nor II is sufficient, even together

Both I and II together are needed

I alone is sufficient, but II alone is not

II alone is sufficient, but I alone is not

Either I or II alone is sufficient

Neither I nor II is sufficient, even together

Both I and II together are needed

I alone is sufficient, but II alone is not

II alone is sufficient, but I alone is not

Either I or II alone is sufficient

Neither I nor II is sufficient, even together

Both I and II together are needed

I alone is sufficient, but II alone is not

II alone is sufficient, but I alone is not

Either I or II alone is sufficient

Neither I nor II is sufficient, even together

Both I and II together are needed

I alone is sufficient, but II alone is not

II alone is sufficient, but I alone is not

Either I or II alone is sufficient

Neither I nor II is sufficient, even together

Both I and II together are needed