The correct option is B Kushinagar
Lord Buddha was born at Lumbini near Kapilavastu. His childhood name was Siddhartha. After a long meditation, He got the true knowledge under a peepal tree at Bodh Gaya. After that, he became Buddha means "Enlightened One". He delivered his first sermon at Sarnath near Varanasi and got nirvana at Kushinagar in eastern UP.