What is the purpose of the NCh436.Of2000 standard?

I- To establish general requirements for occupational accident prevention measures to be adopted in companies.
II- To replace the NCh436.Of51 standard.
III- To provide technical information on the prevention of occupational accidents.
IV- To establish specific safety requirements for the construction industry.
a) I and II are correct.
b) II and III are correct.
c) I and III are correct.
d) III and IV are correct.