Read carefully the passage given below and answer the questions that follow:Onece Amar Singh, the General of Shah Jahan's army was passing through a desert. he saw a thirsty man dying out of thirst. Amar Singh gave him water to drink. The man was relaxed. He got new life. He said to him "Amar Singh, you saved my life. I am a Pathan named Narshah waj Khan. I will shed my blood for you and your family if needed." The Pathan proved true to his word. When Amar Singh was killed treacherously and his dead body was captured by Shah Jahan,Narshahwaj Khan came with his army and fought to the vast army of Shah Jahan.He with his entire army was killed in the battle. But, he immortalised the tale of gratitude and friendship.(a) Who was Amar Singh and who was Narshahwaj Khan ? (b) How did Amar Singh save his life ?. (c) How did Narshahwaj Khan return the obligation of Amar Singh ? (d) What moral do you get from the above passage ?