Which part of the mammalian body has a single pair of bones?

What are the points of articulation for the pectoral and pelvic girdles?

Match the following columns:

Column-$I$ (Bone region)	Column-$II$ (Number of bones)
$P$. Thigh	$I$. $7$
$Q$. Shank	$II$. $14$
$R$. Knee cap	$III$. $1$ (Long bone)
$S$. Ankle	$IV$. $2$
$T$. Metatarsals	$V$. $1$ (Cup-shaped)
$U$. Phalanges	$VI$. $5$

The deltoid ridge is found in which one of the following bones?

The pelvic girdles of females are ...... than those of males.

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?