Question: who tricked karna in mahabharat?
Answer: Karna (son of Sun God) was born with a set of armour and earrings permanently attached to his body, due to which he could never be killed. God Indra, the father of Arjuna, tricked Karna and took away the divine set. So, in the final battle Arjuna killed Karna.] That's the back-story.