adjective degree

[hanuman_2000]

Hello,

1.Sita is the best student in the class.

I have to change the degree of the adjective used in the above sentence without change in meaning.

[ Positive Degree]
A. No other girl in the class is as good as Sita.
B. No other girl is as good as Sita in the class.

[ Comparative ]

C. Sita is taller than any other girl in the class.

I would like to know whether (A,B,C) are correct and the position 'in the class' in (A)?

Thanks.

[Alan]

1. A is more natural than B, but B is possible.

2. C is correct.