Explanation

In Mauryan administration as described in the Arthashastra, the Samahartri was the chief collector of revenue, the Akshapatala the records-cum-audit officer, and the Samnidhatri the treasurer — pairs 1, 3 and 4 are correctly matched. The Dauvarika, however, was the chief palace attendant or chamberlain, not the chief of the army. Hence option B is correct.