By the standard NCERT convention, $0.2$ percent phenol is an antiseptic and $1$ percent phenol is a disinfectant. A hospital stock bottle holds $1.0$ percent phenol. How should $250\mathrm{mL}$ of a solution of antiseptic strength for a wound be prepared, and why is the stock unsuitable on the wound?

1. ADilute 1250 mL of the stock to 250 mL with water; 1 percent solution is already antiseptic
2. BDilute 50 mL of the stock to 250 mL with water; phenol is not toxic at any strength
3. CMix 50 mL of the stock with 250 mL of water; 1 percent solution is too dilute to disinfect
4. DDilute 50 mL of the stock to 250 mL with water; the 1 percent solution is a disinfectant that is too harsh for living tissue