This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Subject name: Pediatrics
What is the following device used to measure? 
Select and explain. 
A. Ovarian size, B. Size of a Tumor, C. Size of Fecolith, D. Testicular size
D: Testicular size
Answer: D: Testicular size 
Explanation: Orchidometer-used to measure testicular size - Stretch the scrotal skin and measure testicular size with orchidometer. - Testicular enlargement first sign of pubey in boys For the assessment of pubey -Tanner's staging or SMR (Sexual Maturity rating) Pubey in females :1st sign - Thelarche (development of breast buds)