As a result of a decisions to allow only two or three telecom operator in a particular service area, TRAI allocates R-Com and Vodafone to operate only in the east of India and Idea and Airtel operate only in south. R-Com has got 28% subscribers in the east while Vodafone has 72% subscribers; similarly Idea has 48% subscribers in the south while Airtel has 52% subscribers. How many subscribers do these four players have in 2010?

It is given that R-com has 28% subscribers in the east and Vodafone has 72% subscribers in the east, these two are the only operators in the east.
Similarly, Idea and Airtel are the only players in the south whose shares are 48% and 52% respectively.
We are not given that name of the states which need to be considered under southern part of the country. But the number of subscribers should be in the same ratio of shares.

Checking with the options

Option (A): R-Com's share = $$\dfrac{28.03}{28.03+73.22}\times 100$$ = 27.68 percent. We are given that Rcom has 28% shares. Hence, this option is incorrect. 

Option (B): R-Com's share = $$\dfrac{30.03}{30.03+72.82}\times 100$$ = 29.19 percent. We are given that Rcom has 28% shares. Hence, this option is incorrect.

Option (C): R-Com's share = $$\dfrac{28.03}{28.03+76.24}\times 100$$ = 26.88 percent. We are given that Rcom has 28% shares. Hence, this option is incorrect.

Option (D): R-Com's share = $$\dfrac{30.03}{30.03+77.22}\times 100$$ = 28 percent. We are given that Rcom has 28% shares. Hence, this option is the correct.