The correct option is
C confined
Option C: 'Confined' means 'limited or restrained'. It's suitable to the given sentence in meaning: Indian women have been limited to the four walls of the house.
Hence option C is correct.
Options A, B and D:
'Subjected' means 'open or exposed to'.
'Unrestricted' means 'open and free'.
'Assigned' means 'to give or allocate a task'.
These wonders do not complete the sentence in meaning.
Hence these options are wrong.