Who inaugurated the longest electrified railway tunnel in Andhra Pradesh?

The Vice President of India, Shri Venkaiah Naidu inaugurated the longest electrified railway tunnel (6.7km) between Cherlopalli and Rapuru costing Rs 437 crores, and the electrified railway line (112km) between Venkatachalam (Krishnapatnam) and Obulavaripalli costing Rs 1,993 crores in Andhra Pradesh.