The correct answer is (a) Mahipat Shah.
Rani Karnawati was the regent of Mahipat Shah, the ruler of the Parmar dynasty of Malwa. She was a powerful and influential figure in the history of Malwa, and she played a key role in the defense of the kingdom against the Mughals.
Mahipat Shah was the son of Udai Singh II, the ruler of Malwa. He ascended to the throne in 1531, at the age of 12. Rani Karnawati was his mother, and she served as regent during his minority.
Rani Karnawati was a strong and capable ruler. She was able to maintain order in Malwa during a time of great turmoil. She also successfully defended the kingdom against the Mughals, who were expanding their empire into Malwa.
In 1536, the Mughal emperor Humayun invaded Malwa. Rani Karnawati led the Malwa army against the Mughals, and she was able to defeat them. However, Humayun returned in 1537, and this time he was successful in conquering Malwa.
Rani Karnawati was captured by the Mughals, and she was taken to Agra. She was later released, but she died shortly after her release.
Rani Karnawati was a remarkable woman who played a key role in the history of Malwa. She was a strong and capable ruler, and she was able to defend the kingdom against the Mughals. She is remembered as a heroine in Malwa, and her story is still told today.
The other options are incorrect because they are not the names of the Parmar rulers that Rani Karnawati was the regent of.