pelvis & thigh actions

Question 1

hip joint flexion (7)

Answer 1

psoas major
iliacus
tensor fasciae latae 
sartorius
rectus femoris
gluteus medius (anterior fibers)
gluteus minimus

Question 2

hip joint extension (6)

Answer 2

gluteus maximus (all fibers)
biceps femoris (long head)
semitendinosus
semimembranosus
adductor magnus (posterior fibers)
gluteus medius (posterior fibers)

Question 3

hip joint medial/internal rotation (8)

Answer 3

gluteus medius (anterior fibers)
gluteus minimus
tensor fasciae latae
adductor magnus
adductor longus
adductor brevis
pectinous
gracilis

Question 4

hip joint lateral/external rotation (11)

Answer 4

gluteus maximus (all)
piriformis
quadratus femoris
obturator internus 
obturator externus
gemellus superior
gemellus inferior
gluteus medius (posterior fibers)
psoas major
iliacus
sartorius