This question tests knowledge of joint classification from NCERT Biology Chapter 17. The context explicitly identifies: (a) Pivot joint between atlas and axis; (b) Saddle joint between carpal and metacarpal of thumb; (c) Hinge joint is a synovial joint type mentioned in context, applicable to phalanges; (d) Ball and socket joint - the context mentions acetabulum where thigh bone (femur) articulates, and ball and socket is listed as a synovial joint type; (e) Fibrous joints are shown by flat skull bones fusing end-to-end with dense fibrous connective tissues in the form of sutures; (f) Cartilaginous joint - the pubic symphysis contains fibrous cartilage, and cartilaginous joints are joined together with cartilage.