New Delhi [India], January 24 (ANI): As the country is gearing up for the 75th Republic Day, the Delhi Metro Rail Corporation said on Wednesday that the metro services will start at 4 am on all its lines to facilitate the public to reach Kartavya Path to witness the celebrations on January 26. According to DMRC, the train services will be available at a headway of 30 minutes till 6 am and thereafter regular timetable will be followed for the rest of the day. In addition, people who will be in possession of bonafide e-invitation cards/e-tickets for attending the Republic Day ceremony will be is…