Explanation:

Both statements are correct.

• The Ministry of Health and Family Welfare has started the process of finalising various provisions of the draft Bill for a new national public health law.
• The proposed National Public Health Act has been in the works since 2017 and, once enacted, will replace the 125-year-old Epidemic Diseases Act, 1897.
• It will also cover public health emergencies caused by bioterrorism, natural disasters, chemical and nuclear attacks or accidents.
• The draft Bill proposes a four-tier health administration architecture, with "multi sectoral" national, state, district and block-level public health authorities who will have "well defined" powers and functions to deal with "public health emergencies".

Hence option 4th is correct.