Olecranon fossa is present in which of the following bones?

Which one of the following is the correct matching of three items and their grouping category?

The cavity between the coracoid and scapula is known as:

The hip bone (coxal bone) is formed by the fusion of three bones: $a$ (ilium), $b$ (ischium), and $c$ (pubis). Which of these bones are involved in the formation of the acetabulum?

The thumb (great toe) of the foot is called:

Given below is a diagram of the left human hindlimb as seen from the front. It has certain mistakes in labeling. Two of the wrongly labelled bones are