Three statements are given followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.

Statements:

All cancers are diseases.

All tuberculosis are diseases.

All diseases are curable.

Conclusions:

I. All tuberculosis are curable.

II. Some cancers are tuberculosis.

III. All cancers are curable.