Step 1:
Ekanathaswami belonged to Maharashtra, while Narayana Guru belonged to Kerala.
Step 2:
Shankaradeva was the great saint and reformer of Assam.
Step 3:
Vidyapati is associated with Bihar and Mithila region.
Step 4:
Thus, the correct sequence is:
\[
A-III,\; B-IV,\; C-II,\; D-I
\]
Hence, the correct answer is:
\[
\boxed{\text{(2)}}
\]