Correct Answer: A

Rationale: The correct intervention is to administer Rh immune globulin within 72 hours of delivery. This is essential to prevent the mother from forming antibodies against Rh-positive blood, which could cause complications in future pregnancies. Choice B is incorrect as the administration should be immediate postpartum. Choice C is incorrect as Rh immune globulin is needed for each Rh-incompatible pregnancy. Choice D is incorrect as only the mother, who is Rh-negative, needs Rh immune globulin.

Correct Answer: C

Rationale: The correct answer is C: Impaired liver function. Impaired liver function is a contraindication to the use of oral contraceptives because they are metabolized in the liver. Choices A, B, and D are incorrect. Thyroid disease, allergy to penicillin, and abnormal blood glucose levels are not contraindications to combined oral contraceptives.

Correct Answer: A

Rationale: The correct intervention is to administer Rh immune globulin within 72 hours of delivery. This is essential to prevent the mother from forming antibodies against Rh-positive blood, which could cause complications in future pregnancies. Choice B is incorrect as the administration should be immediate postpartum. Choice C is incorrect as Rh immune globulin is needed for each Rh-incompatible pregnancy. Choice D is incorrect as only the mother, who is Rh-negative, needs Rh immune globulin.

Correct Answer: B

Rationale: The correct answer is B. A urine output of 20 mL/hour is a sign of magnesium toxicity because decreased urine output can lead to accumulation of magnesium. Choices A, C, and D are not indicators of magnesium toxicity. Elevated blood glucose, high systolic blood pressure, and normal BUN levels do not specifically point towards magnesium toxicity.

Correct Answer: B

Rationale: The correct answer is to place the client in a private room. Clostridium difficile (C. diff) infection requires contact precautions, which include isolating the client in a private room to prevent the spread of infection to others. Wearing a face shield may be necessary in certain situations for protection but is not the primary measure for C. diff. Placing the client in a negative pressure room is not specifically indicated for C. diff unless the client has additional respiratory issues. Using alcohol-based hand rub following client care is not sufficient for C. diff control; thorough handwashing with soap and water is recommended due to the spore-forming nature of C. diff.