Correct Answer: B

Rationale: Periodontitis is the dental condition characterized by inflammation of the gingival tissues surrounding the teeth. It is typically caused by poor oral hygiene practices, leading to plaque buildup and eventually gum disease. If left untreated, periodontitis can cause serious damage to the gum tissue and the underlying bones supporting the teeth, which can eventually result in tooth loss. Regular dental check-ups, proper oral hygiene habits, and professional cleanings are important for preventing and managing periodontitis.

Correct Answer: B

Rationale: The patient's presentation with sudden-onset severe lower abdominal pain, nausea, vomiting, inability to pass urine, suprapubic tenderness, and a palpable bladder is classic for acute urinary retention. Acute urinary retention is a urological emergency characterized by the sudden inability to pass urine due to the inability to empty the bladder completely. The palpable bladder on physical examination indicates significant bladder distension. This condition can be caused by multiple factors such as bladder outlet obstruction, neurogenic causes, or medications affecting bladder function. Prompt intervention is necessary to relieve the bladder distension, alleviate symptoms, and prevent complications like bladder rupture.

Correct Answer: C

Rationale: Patients prescribed proton pump inhibitors (PPIs) for gastroesophageal reflux disease (GERD) should be instructed to take the medication 30 minutes before meals. This is because PPIs work best when taken on an empty stomach, allowing them to inhibit the gastric proton pump effectively and reduce acid production in anticipation of food intake. Taking the medication before meals ensures optimal absorption and effectiveness in controlling symptoms of GERD.

Correct Answer: A

Rationale: Immunity that the baby gets from the immune mother through breastfeeding is considered passive natural immunity. This is because the baby receives pre-formed antibodies from the mother's breast milk, providing temporary protection until the baby's own immune system is fully developed. This type of immunity is passive since the baby does not produce its antibodies, and it is considered natural because it happens through a natural process of breastfeeding.

Correct Answer: B

Rationale: In a professional setting like a classroom or a meeting, it is important for the CI (chief instructor) to set the atmosphere by welcoming everyone and discussing the objectives of the ward class. By discussing the objectives, the CI can provide a clear direction for the session and ensure that everyone is on the same page in terms of what needs to be accomplished. This not only helps focus the participants but also creates a sense of purpose and organization, setting a positive tone for the rest of the interaction. Showing a picture of the breast or giving an anecdote about an old man may not be appropriate or relevant in this context. Going ahead with the first part of the lecture without any welcoming or setting the atmosphere may make the participants feel rushed or disconnected from the session's purpose.