This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnosis in Obstetrics, Subject name: Gynaecology & Obstetrics
At 12 week pregnancy "CRL" is: 
Select and explain. 
A. 60 mm, B. 100 mm, C. 120 mm, D. 250 mm
A: 60 mm
Answer: A: 60 mm 
Explanation: Ans. (a) 60 mmRef. DC Dutta 7th ed./ 41; William's Obstetrics 22nd ed./ 91* By the end of the 12th week of pregnancy, when the uterus usually is just palpable above thesymphysis pubis, the crown-rump length of the fetus is 6 to 7 cm i.e. 60 to 70 mm.* Please refer to above explanation for more details.