I have military and administrative experience. I have helped in setting up the foundation of an empire when the king of that kingdom had died. When all the Sikh chiefs were afraid to fight an Afghan ruler, I had called the Sarbat Khalsa on behalf of the young prince and challenged the Sikh misaldars to fight the Afghan ruler when he was trying to enter India. Who am I?

The correct option is D Sada Kaur, Mother-in-law of Mehtab Kaur
Sada Kaur was married to the chief of the Kanhaiya Misl, Gurbax Singh. She was experienced in military and administrative affairs. She was an important pillar for establishing the empire of Ranjit Singh when he had lost his father and was very young to be the king. She had challenged the Sikh misaldars to fight with Shah Zaman, the ruler of Afghan. She helped Ranjit Singh acquire the entire Sikh empire. She left the kingdom when she felt ignored by Ranjit Singh and was later house arrested by Ranjit Singh when he captured her territory. She was allowed to return to her region when she would sign a deed in favour of her grandson and Ranjit Singh's second son, Sher Singh.