(a) the number of railway tracks electrified during 2014 to 2019;
(b) the targets set for electrification of railway tracks from 2019 till 2024;
(c) the length in Kilometres of railway tracks electrified in Ludhiana;
(d) whether the electrification of tracks is prevented due to lack of sub-stations; and
(e) if so, the number of sub-stations that are needed to fulfil electrification of all tracks in India?