IBPS Clerk Prelims 7-Dec-2019 Paper

In the question below are given two statements followed by three conclusions numbered I, II and III. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.
Statements:
Some camphor are rubidium
All bauxite is titanium
All rubidium is bauxite
Conclusions:
I. All rubidium is titanium
II. Some titanium is a camphor