(D) Depository Participant
A Depository Participant (DP) serves as the intermediary (agent) between the depository and the investors, appointed by the depository with SEBI's approval.
Source: Chapter 6, "Who is a Depository Participant (DP)?"
The passage clearly states: "The Depository provides its services to investors through its agents called depository participants (DPs)." In the question, Arron Financials is itself a DP — confirming option (D). Stock exchanges, clearing corporations, and RTAs play different roles and are not described as the depository–investor intermediary in this context.