My mother is sister of your brother. What an I to you?
My mother is sister of your brother. What an I to you?
میری ماں تمہارے بھائی کی بہن ہے۔ میں آپ کے لیے کیا ہوں؟
Explanation
If "My mother is the sister of your brother," then:
Your brother is my mother’s brother, which makes him my maternal uncle.
Therefore, "I" am the niece or nephew of your brother (my maternal uncle).