Read this and answer the question. If the question is unanswerable, say "unanswerable".

Prior to the 12th century, women accounted for less than one percent of the world’s Islamic scholars. However, al-Sakhawi and Mohammad Akram Nadwi have since found evidence of over 8,000 female scholars since the 15th century. al-Sakhawi devotes an entire volume of his 12-volume biographical dictionary al-Ḍawʾ al-lāmiʻ to female scholars, giving information on 1,075 of them. More recently, the scholar Mohammad Akram Nadwi, currently a researcher from the Oxford Centre for Islamic Studies, has written 40 volumes on the muḥaddithāt (the women scholars of ḥadīth), and found at least 8,000 of them.

In what book was a section reserved for the study of Islamic female students?
al-Ḍawʾ al-lāmiʻ