This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
The patient whose hands are developmentally delayed with a short, stocky build. Which of the following is the most likely diagnosis? 
Select and explain. 
A. achondroplastic dwarf, B. Down syndrome, C. Klinefelter's syndrome, D. pseudohypoparathyroidism
D: pseudohypoparathyroidism
Answer: D: pseudohypoparathyroidism 
Explanation: (d) Source: (Felig, pp. 1143-1145)The deformity of the hands is due to short metacarpals. Other deformities include short metatarsals, round facies, and thickening of the calvarium. The syndrome is caused by target organ unresponsiveness to PTH, and was the first hormone resistance syndrome described.