This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
What type of joint is the growth plate - 
Select and explain. 
A. Fibrous, B. Primary cartilaginous, C. Secondary cartilaginous, D. Plane joint
B: Primary cartilaginous
Answer: B: Primary cartilaginous 
Explanation: Cartilaginous joints
1)    Primary cartilaginous joints (synchondrosis, or hyaline cartilage joint): These are:-

The joint between epiphysis and diaphysis of a growing long bone, i.e. physis.
Spheno-occipital joint
1st costosternal joint (1st chondrosternal joint)
Costochondral joints

2) Secondary cartilaginous joints (Symphyses or fibrocartilaginous joints) : These are :-

Symphysis pubis
Sacroccygeal joint
Manubriosternal joint
Intervertebral disc
Symphysis menti