Final answer:
The Torah is the Holy Book revealed to Hazrat Musa, significant in both Islamic and Judaic traditions(option b).
Step-by-step explanation:
The Holy Book revealed to Hazrat Musa (Moses) is the b)Torah.
The Torah is a central reference of the religious Judaic tradition and is considered by Jews as the divine guidance given to Moses by God. In Islam, it is also acknowledged as a holy scripture and respected as the word of God. It holds a significant place in Islamic tradition as Muslims believe in the prophets and revelations that came before the Prophet Muhammad, who received the Qur'an, which is the final revelation and the sacred text of Islam.