what are all the directors names?
padamvir singh, rudhra gangadharan, d.s. mathur, binod kumar, wajahat habibullah, b.s. baswan, n.c. saxena, b.n. yugandhar, r.n. chopra, k. ramanujam, r.k. shastri, i.c. puri, p.s. appu, g.c.l. joneja, b.c. mathur, rajeshwar prasad, d.d. sathe, k.k. das, m.g. pimputkar, s.k. dutta, a.n. jha
which began between 1980-1990
b.n. yugandhar, r.n. chopra, k. ramanujam, r.k. shastri, i.c. puri, p.s. appu
which ended in 1993?
b.n. yugandhar