According to the Planning Commission's Estimates (Expert Group Methodology) about percentage of population below the poverty line population, which option/options of the following is/are correct?

a. In 1983-84, Rural area poverty was 46.6 percent.

b. 36.0 percent of the population was below the poverty line in 1993-94.

c. 35.0 percent of the population in Urban area was below the poverty line in 1990-91.

d. In India, 37.0 percent of the total population was below the poverty line in 1987-88.