Sternochondral joint is ?

Ans. is 'a' i.e., Primary cailaginousCostochondral (sternochondral) joints are primary cailaginous joints.Cailaginous joints 1) Primary cailaginous joints (synchondrosis, or hyaline cailage joint) : These are :-Joint between epiphysis and diaphysis of a growing long bone, i.e. physis.Spheno-occipital joint1st costosternal joint (1st chondrosternal joint)Costochondral joints2) Secondary cailaginous joints (Symphyses or fibrocailaginous joints) : These are :-Symphysis pubis manubriosternal joint Symphysis mentiSacroccygeal jointinterveebral disc