Step 1: Nature of accumulated profits.
Accumulated profits (Reserves, General Reserve, Undistributed Profits) belong to existing partners.
Step 2: Adjustment during reconstitution.
At admission, retirement, or death of a partner, these profits are transferred to partners’ capital accounts in their old profit-sharing ratio.
Step 3: Conclude.
Thus, accumulated profits are transferred to Partners’ Capital A/c.
Final Answer:
\[
\boxed{\text{Partners’ Capital A/c}}
\]