sir jab humne root node delete kar di aur suppose kar lo ki 6 k right m bhi subtree h to uske lie prateek sir n is video m case consider nhi kiya ?
Doubt in 3rd case when we delete root node
recursively, jab us node ki jagah khali hogi 3rd case mein toh age ka tree apne aap bnke aega
if u notice carefully, toh third case k recursion call m ab humne vohi node pass kra hai jo is bar delete hua hai, matlab jis node ne deleted node ko replace kra hai, mne ab recursion se kaha ki mene ye wala node delete krdiya, ab jo agla node hai use tu delete krke, tree sahi banake laa toh vo kam recursion krega