| Она опиралась на руку мужа. | She leaned on her husband's arm. |
| Её руки покраснели от холода. | Her hands turned red from the cold. |
NB When the word рука functions as a subject and does not have a descriptive modifier, the construction рука у + Genitive is often preferred to (a) and (b), above: | |
| Руки у неё покраснели от холода. | Her hands turned red from the cold. |
| левая/правая рука | the left/right arm/hand |
| Левая/правая рука у меня онемела. | My left/right arm went numb. |