New Delhi, Feb 28 (ANI): Invoking eminent personalities like JK Rowling and Thomas Edison, Prime Minister Narendra Modi in his 17th edition of Mann ki Baat on Sunday gave a message of encouragement to the students who are set to appear for the upcoming board exams, saying that they need to hone 'discipline' as it was bound to help them focus in their studies and therefore have great results. The Prime Minister also played a special message by Indian cricket legend Sachin Tendulkar and Chess maestro Vishwanathan Anand for the students preparing for the exams.