Which of the following statement (s) is/are NOT true about Al-Biruni?

Biruni was born in 973, in Khwarizm in present-day Uzbekistan. He was well versed in several languages: Syriac, Arabic, Persian, Hebrew and Sanskrit. In 1017, when Sultan Mahmud invaded Khwarizm, he took several scholars and poets including Al-Biruni back to his capital, Ghazni; He arrived in Ghazni as a hostage, but gradually developed a liking for the city, where he spent the rest of his life until his death at the age of 70.