Monocytes/macrophages take part in both the inflammatory and the proliferative phases, so they are essential for normal healing. The other options are wrong:

• Their role is not limited to phagocytosis (D is false).
• Fibroblasts arrive with the proliferative phase, which begins after 2-4 days, not 24-36 h (C is false).
• Collagen keeps being deposited and remodelled for weeks to a year, and peak strength comes at about 60 days, so collagen is not maximal at 1 week (A is false).