The correct options are
B He befriended the Nizam of Arcot.
C He sidelined the Wodeyar king Dalawayee.
Hyder Ali sidelined the Wodeyar king, Krishnaraja Wodeyar. He weakened Dalawayee or the commander in the military. He proved himself during the siege of Devanahalli with his military prowess. Moreover, his military actions against the Nizam of Arcot made him even more popular. Famously, he was called Nawab Hyder Ali.