Assessing the patient's psychological readiness for surgery is essential to prevent potential complications in a patient scheduled for amputation. Pre-operative anxiety, fear, or emotional distress can impact the patient's overall well-being and affect their post-operative recovery. Identifying and addressing these concerns before the surgery is crucial to promote a positive surgical experience and improve outcomes.
  
a. Performing active range of motion exercises on the affected limb: While range of motion exercises may be beneficial in certain cases, this intervention is not specific to preventing pre-operative complications. Pre-operative exercises may be recommended in some cases to improve overall limb function, but they are not directly related to preventing complications.
b. Administering post-operative pain medications: Administering post-operative pain medications is a consideration after the surgery, not a pre-operative intervention. Pain management strategies are planned and implemented to address pain after the amputation.
d. Educating the patient about post-operative care and rehabilitation: Patient education about post-operative care and rehabilitation is vital, but it is not a pre-operative intervention to prevent complications. This education takes place before and after the surgery to prepare the patient for the recovery process.