The social worker _____ the two old

The social worker _____ the two old sisters who were ill.

1. called on the house of
2. called to
3. called on
4. called to the house of

Hasil (Bahasa Indonesia) 1:

Pekerja sosial ___ dua saudara tua yang sakit.1. disebut di rumah2. dipanggil untuk3. menyerukan4. dipanggil ke rumah