(a)India's trade balance remained negative for the entire period from 1949-50 to 2015-16.
(b)India's trade balance remained positive for the entire period from 1949-50 to 2015-16.
(c)India's trade balance remained negative for the entire period from 1949-50 to 2015-16 except two years 1972-73 and 1976-77, when it was positive.
(d)India's trade balance remained positive for the entire period from 1949-50 to 2015-16 except two years 1972-73 and 1976-77, when it was negative.