Answer :
(A) 6000 sqkm
Koria district has 6 spheres each representing 1000 sqkm of area. Therefore total area represented by Koria district = 6 
1000 = 6000 sqkm.
(B) Raigarh and Jashpur
Both Raigarh and Jashpur have 6.5 spheres representing area of 6500 sqkm each.
(C) 4
Raigarh, Rajnandgaon, Koria and Jashpur all districts have more than 5 spheres representing areas more than 5000 sqkm.
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