Correct Answer: 780

Solution : Population of State B = 6000
Percentage of people below the poverty line in State B = 13%
Number of people below the poverty line in State B = 13% of 6000 = 780
The ratio of males to females in State B below the poverty line = 8 : 5
Number of females below poverty line in State B = $\frac{5}{5+8}\times 780=300$
Population of State C = 6000
Percentage of people below the poverty line in State C = 26%
Number of people below the poverty line in State C = 26% of 6000 = 1560
The ratio of males to females in State C below the poverty line = 9 : 4
Number of females below poverty line in State C = $\frac{4}{4+9}\times 1560=480$
Total number of females below the poverty line in States B and C = 300 + 480 = 780
Hence, the correct answer is 780.