Correct Answer: C

Rationale: Step 1: The described behavior is known as the asymmetric tonic neck reflex (ATNR), a normal infantile reflex. Step 2: The ATNR typically emerges around birth and should disappear between 3 and 4 months of age. Step 3: The reflex helps with hand-eye coordination and development of body awareness. Step 4: Choice A is incorrect as the behavior is not abnormal or related to atonic neck reflex. Step 5: Choice B is incorrect as the reflex typically disappears by 3-4 months, not by the first year of life. Step 6: Choice D is incorrect as it describes a different pattern of movement than what is observed in the ATNR. Summary: The correct answer is C because the behavior described is a normal infantile reflex that typically disappears between 3-4 months of age, aiding in the baby's development.

Correct Answer: C

Rationale: Rationale for Correct Answer (C): 1. Red glow in pupils indicates a normal reflection off the inner retina known as the red reflex. 2. The red reflex helps to visualize the internal structures of the eye, including the retina. 3. This finding is expected during an ophthalmoscopic examination. 4. No abnormality is suggested by the presence of a red glow in the pupils. Summary of Other Choices: A: Incorrect. Red glow does not indicate an opacity in the lens or cornea. B: Incorrect. Checking the light source is unnecessary as red glow is a normal finding. D: Incorrect. Referral is not needed as red reflex is a normal part of an ophthalmoscopic exam.

Correct Answer: C

Rationale: The correct answer is C: Hydrocephalus. The nurse suspects hydrocephalus due to the symptoms presented by the infant: enlarged cranium, small face, dilated scalp veins, and "setting sun" eyes. Hydrocephalus is the abnormal accumulation of cerebrospinal fluid in the brain, leading to increased intracranial pressure and characteristic physical signs such as an enlarged head. Craniotabes (A) is softening of the skull bones, not associated with these symptoms. Microcephaly (B) is characterized by a smaller head size, opposite to what is described in the question. Caput succedaneum (D) is swelling of the soft tissues of the infant's scalp, which is unrelated to the symptoms mentioned.

Correct Answer: D

Rationale: Clubbing of the fingernails is characterized by an increased angle between the nail base and the nail plate (usually 180 degrees or greater) and a spongy texture at the nail base. This is due to underlying tissue changes associated with conditions like lung disease. Choice D is correct as it accurately describes the characteristic findings of clubbing. Choices A, B, and C do not align with clubbing features. Choice A describes tenderness and firmness, not sponginess and increased angle. Choice B mentions a convex profile and ridges, which are not specific to clubbing. Choice C includes an angle of 150 degrees, which is less than the typical angle seen in clubbing.

Correct Answer: B

Rationale: The correct answer is B: Basal cell carcinoma. The clinical presentation of a papule with rounded, pearly borders, central red ulcer, slow growth, and location on the nose is highly indicative of basal cell carcinoma. Basal cell carcinoma commonly presents with these characteristics and is the most common type of skin cancer. It is locally invasive but rarely metastasizes. A: Acne is a common skin condition characterized by comedones, papules, and pustules, not typically presenting with the described features. C: Malignant melanoma usually presents as an asymmetric, irregularly bordered, multicolored lesion with rapid growth and potential for metastasis. D: Squamous cell carcinoma typically presents as a scaly, crusted lesion with potential for metastasis, not showing the described features.