Ligaments injuries

Patient: Hi doctor, I fell down from the bike on Dec 4 2012, and taking treatment from an orthopaedic. He suggested mri. The mri findings are as follows,1. Grade 1 tear in posterior horn of medial meniscus,2. Grade 1 injury in proximal substance of posterior cruciate ligament,3. Bony confusion in patella,4. Irregularities in anterior cortex of patella,5. Grade 1 injury in proximal patellar ligament,6. Mild joint effusion.Please suggest me whether surgery is required or physical exercise will help me out.