The correct option is D He did not indulge in their personal administration.
After Behlol Khan Lodhi, Sikandar became the Sultan of Delhi, which also gave him the power to have more control over his province and the local rulers under him. To keep the rulers under him happy, he didn't use to bother them in their administration but only took a small amount of tax. It also helped the local rulers to exercise their freedoms and prevent their coalition with the north-western rulers.