Toothbrushing, correct

Correct Answer: A

Rationale: The correct answer is A because it is recommended to change toothbrushes every 3 months to maintain effective cleaning and prevent bacterial buildup. Regularly changing toothbrushes ensures the bristles remain firm and effective in removing plaque and bacteria. Choice B of changing toothbrushes every birthday is not as precise and may result in using a worn-out toothbrush. Choices C and D are left blank as they are irrelevant and not related to the recommended practice of changing toothbrushes regularly.

Correct Answer: B

Rationale: The correct answer is B: File nails straight. Filing nails straight helps prevent nails from weakening and breaking. It maintains nail strength and shape. Following the curve (choice A) can cause uneven edges and weaken nails. Choices C and D are not provided, but filing nails in a straight motion is generally recommended for healthy nail care.

Correct Answer: B

Rationale: The correct answer is B because urine culture and sensitivity are used to identify the specific organism causing the infection in the urinary tract. This is crucial for selecting the most effective antibiotic treatment. Choice A is incorrect because urine culture does not analyze elements like blood and pus, but rather focuses on microbial growth. Choices C and D are incomplete and do not provide a relevant explanation for the purpose of urine culture and sensitivity.

Correct Answer: B

Rationale: The correct answer is B: Unknown. Acne is a complex skin condition with various contributing factors such as genetics, hormones, bacteria, and inflammation. Scientific research has not definitively identified a single cause of acne, making it a multifactorial condition. Choice A is incorrect as there is no direct evidence linking peanuts or oily foods to acne development. Choice C and D are blank options and do not provide any relevant information. In summary, the correct answer is B because acne is not solely attributed to a single cause, and it is still not fully understood by medical experts.

Correct Answer: A

Rationale: Certainly! Growth refers to an increase in size, quantity, or extent. Therefore, the correct answer is A: Quantity. This choice aligns with the definition of growth as it pertains to an increase in amount or number. Option B: Quality does not directly relate to the concept of growth in terms of quantity. Choices C and D are incomplete and do not provide any relevant information to define growth. In summary, the correct answer is A because growth typically refers to an increase in quantity rather than quality.