Correct Answer: A

Rationale: The correct answer is pain on movement and weight bearing. This pain is the primary sign of prosthesis displacement after a total hip replacement, indicating pressure on nerves or muscles due to dislocation. Hemorrhage is not typically associated with prosthesis displacement. While the affected leg may appear longer, this is not the primary sign of displacement; it might actually be shorter due to muscle spasm. Edema in the incision area is not a primary indicator of prosthesis displacement.

Correct Answer: B

Rationale: The correct answer is that chemotherapy is a systemic treatment affecting both tumor and normal cells. 5-FU, as an antimetabolic drug, inhibits DNA synthesis and interferes with cell replication systemically. It affects all rapidly growing cells, including malignant and normal ones. This drug is used as adjuvant therapy for various cancers. Choice A is incorrect because chemotherapy affects both tumor and normal cells, not just tumor cells. Choice C is incorrect as chemotherapy has been proven effective in treating cancer. Choice D is incorrect because chemotherapy often causes side effects like bone marrow depression, anorexia, stomatitis, nausea, and vomiting.

Correct Answer: A

Rationale: A contusion is a soft tissue injury caused by blunt force. It is an injury that does not break the skin, caused by a blow, and characterized by swelling, discoloration, and pain. The immediate application of cold might limit the development of a contusion. A strain is a muscle pull from overuse, overstretching, or excessive stress. A sprain is caused by a wrenching or twisting motion. A dislocation is a condition where the articular surfaces of the bones forming a joint are no longer in anatomical contact. Therefore, the correct answer is 'contusion' as it specifically relates to soft tissue injury caused by blunt force.

Correct Answer: C

Rationale: A diet high in fiber content can help lower cholesterol levels. Fiber-rich foods such as grains, apples, potatoes, and beans are known to aid in reducing cholesterol by binding to cholesterol in the digestive system and preventing its absorption into the bloodstream. Choice A is incorrect as the question does not specify losing weight rapidly but rather focuses on the benefits of a high-fiber diet, which includes aiding in weight management through promoting satiety and regulating digestion. Choice B is incorrect because while fiber helps manage blood sugar levels, it is not directly related to reducing diabetic ketoacidosis, a serious complication of diabetes. Choice D is incorrect as a high-fiber diet does not reduce the need for folate; however, it can aid in the absorption of folate and other essential nutrients.

Correct Answer: C

Rationale: The correct answer is sodium and chloride. These two electrolytes are the major components of extracellular fluid. Potassium and phosphate (Choice B) are not the major electrolytes in the extracellular fluid. Potassium is primarily an intracellular ion, and phosphate is more abundant in the intracellular fluid and bones. Sodium and phosphate (Choice D) are also not the major electrolytes in the extracellular fluid. Chloride plays a crucial role in maintaining electrolyte balance and is predominantly found in extracellular fluid alongside sodium.