The correct answer is: A. Banda Bahadur.
Banda Bahadur was a Sikh warrior who led a rebellion against the Mughal Empire in the early 18th century. He was defeated and captured in 1709, and executed in 1716.
Dhruv Dev was a Rajput ruler of the Bundi state in Rajasthan. He was a contemporary of Banda Bahadur, and he gave shelter to Banda Bahadur and his followers in 1703.
Avtar Singh, Zorawar Singh, and Sada Kaur were all Sikh warriors who fought alongside Banda Bahadur. They were all killed in battle.
Banda Bahadur was a charismatic leader who inspired many Sikhs to join his rebellion. He was a skilled military strategist, and he led his forces to victory in several battles against the Mughals. However, he was ultimately defeated by the Mughals, and he was executed in 1716.
Dhruv Dev was a brave and generous ruler who risked his own life to help Banda Bahadur. He was a true friend to the Sikhs, and he will always be remembered for his courage and compassion.