Which one of the following sequences in the ascending order of their geographical size is correct?
(a) Bihar - Chhattisgarh - Jharkhand - Orissa
(b) Jharkhand - West Bengal - Tamil Nadu - Chattisgarh
(c) West Bengal - Bihar - Chhattisgarh - Tamil Nadu
(d) Chhattisgrah - Jharkhand - Tamil Nadu – Orissa