Where are the intervertebral discs located?

Name the type of joint between the following:
$(a)$ atlas/axis
$(b)$ carpal/metacarpal of thumb
$(c)$ between phalanges
$(d)$ femur/acetabulum
$(e)$ between cranial bones
$(f)$ between pubic bones in the pelvic girdle

Ends of long bones are covered with

Where is the synovial fluid found?

When the head of the $humerus$ fits into the $glenoid$ cavity,the joint is known as:

True joints are known as: