Correct Answer: C

Rationale: The knee-chest position is the most optimal position for examining the rectum. In this position, the patient kneels on the examination table with their chest resting on it, creating a straight line from the head to the lower back. This position allows for easier access and visualization of the rectal area, making it the preferred choice for rectal examinations.

Correct Answer: B

Rationale: When providing mouth care to an unconscious client, the side-lying position is the best choice. This position helps prevent aspiration by allowing any fluids to drain out of the mouth easily, reducing the risk of choking or aspiration pneumonia. Placing the client in a side-lying position also promotes comfort and safety during the procedure.

Correct Answer: C

Rationale: In medical terminology, 'CBR' stands for Complete Bed Rest. This term indicates the necessity for a patient to remain in bed without engaging in any physical activities beyond what is essential for daily living, to aid in the recovery process or to prevent further health complications.

Correct Answer: A

Rationale: The correct position for administering a cleansing enema is the Sims left lateral position. This position is preferred as it helps to facilitate the procedure by allowing gravity to assist in the flow of the enema solution. The individual lies on their left side with the right knee flexed towards the chest, which helps to promote retention of the enema solution and its distribution throughout the colon.

Correct Answer: A

Rationale: Orem's theory, also known as the Self-Care Deficit Nursing Theory, emphasizes individuals' ability to perform self-care to maintain health and well-being. One aspect of this theory is the maintenance of a sufficient intake of air, which is essential for sustaining life and overall health. This self-care component focuses on the individual's ability to meet their physiological needs, including the intake of air, to promote optimal functioning and health.