Final answer:
Mir Mannu was the Mughal governor known for his extreme persecution of Sikhs, including forcing Sikh women to wear necklaces made from the pieces of their butchered children.
Step-by-step explanation:
The individual known for his brutal persecution of Sikhs, including the horrific acts against Sikh women and their children, was Mir Mannu (Muin ul-Mulk). He was a Mughal governor of Punjab from 1748 to 1753, and his reign was marked by severe repression of the Sikh community. The Sikh gurus were seen as a threat to the Mughal rulers due to the growing influence of Sikhism, which is a monotheistic faith that combines elements of Hinduism and Islam. The execution of Guru Tegh Bahadur by Aurangzeb was one of the many instances where the Mughal emperors tried to suppress the Sikhs. The correct answer to the question is 'a. Mir Mannu'.