What are the key points to ensure safety and hygiene in the laboratory?

The laboratory must be clean and tidy.
Only authorized personnel should have access to the laboratory.
It is not necessary to wear protective lab coats or gloves when handling hazardous materials.
Books and papers should be kept away from the work area, as well as any other source of contamination.
a) I and II are correct.
b) II and IV are correct.
c) I, III, and IV are correct.
d) All statements are correct.