The correct chronological order is:
(A) Accession of Chandragupta Maurya
(B) Hathigumpha inscription
(C) The Gupta inscription from Allahabad
(D) Mushika Vamsha by Atula.
This sequence highlights the significant historical and cultural developments starting with Chandragupta Maurya’s accession and ending with the Mushika Vamsha composition.