This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries Around the Thigh & Knee, Subject name: Orthopaedics
A 15 years old girl complains of anterior knee pain which increases on going upstairs and getting up after prolonged sitting. The most probable diagnosis is: 
Select and explain. 
A. Chondromalacia Patellae, B. Plica syndrome, C. Bipartite patellae, D. Patellofemoral arthritis
A: Chondromalacia Patellae
Answer: A: Chondromalacia Patellae 
Explanation: Ans. A. Chondromalacia Patellaea. Bipartite patellae is congenital fragmentation of patellae and is usually asymptomaticb. Plica syndrome- presence of synovial fold in suprapatellar pouch which can undergo inflammation and presents as meniscal symptoms of lockingc. PFA will be seen in later age.