The wife of your father's father is your g____.(根据句意及所给首字母填写单词,完成句子)

问题描述:

The wife of your father's father is your g____.(根据句意及所给首字母填写单词,完成句子)
回答要准

你父亲的父亲的妻子是你的奶奶
grandma
grandmother