Prime Minister Narendra Modi on Sunday reiterated his unity appeal of 'ek rahenge to safe rahenge' while addressing a poll rally in Jharkhand's Gumla. Addressing the public meeting in Jharkhand's Gumla, PM Modi said, "JMM-Congress has always kept Jharkhand backwards but BJP-NDA has made Jharkhand the centre of big schemes related to the development of the country." PM Modi promises …