In embryonic period, formation of all of the following occur by the given time EXCEPT

Correct Answer: D

Rationale: Endoderm formation occurs much earlier than 10 weeks in the embryonic period.

Correct Answer: C

Rationale: The child most likely lost 8 pounds due to a reduction of edema. Acute glomerulonephritis is a condition that can lead to significant fluid retention in the body, causing edema (swelling). When the child was hospitalized and received treatment, such as diuretics, to address the underlying cause of the edema, the excess fluid and weight would be lost. This reduction in edema is the most common reason for weight loss in this scenario, rather than poor appetite, increased potassium intake, or restriction to bed rest.

Correct Answer: B

Rationale: Acute glomerulonephritis is a condition characterized by inflammation of the glomeruli in the kidneys, leading to kidney dysfunction. Common laboratory findings consistent with acute glomerulonephritis include hematuria (blood in the urine), proteinuria (protein in the urine), and white cell casts (indicative of inflammation in the kidney tubules). Polyuria, which refers to excessive urination, is not a typical laboratory finding associated with acute glomerulonephritis. Instead, patients with acute glomerulonephritis often present with oliguria or reduced urine output due to impaired kidney function. Therefore, polyuria is not consistent with the typical laboratory findings of acute glomerulonephritis.

Correct Answer: D

Rationale: Retinoblastoma predominantly occurs in children under 5 years of age, making it the least likely to occur in adults.

Correct Answer: D

Rationale: Paranasal sinuses are considered unfavorable sites in rhabdomyosarcoma staging.