Reputed CA Firm in Delhi NCR, India | Dewan P.N Chopra & Co. As senior, reputed CA Firm based in Delhi, India, Dewan P. N. Chopra & Co. has immense experience in providing diverse professional services to extensive client base. The Chartered Accountant Firm is engaged in a multi-disciplinary practice comprising Audit, Accounting Review, Taxation, Regulatory & Transaction Advisory.