This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Surfaces and Grooves, Subject name: Anatomy
False rib is: 
Select and explain. 
A. 1st, B. 2nd, C. 7th, D. 10th
D: 10th
Answer: D: 10th 
Explanation: 10th rib do not aiculate with sternum anteriorly (false rib). The first seven 'true' ribs connect to the sternum by costal cailages, whilst the remaining lower five 'false' ribs either join the suprajacent (upper) costal cailage (8-10) or 'float' free at their anterior ends as relatively small and delicate structures tipped with cailage. Fig. : Rib cage