Complex sentence: He had completed his studies in M.Com in Cost Accounting.He has also passed his Diploma in Insurance from the Chartered Institution (London) and Chartered Secretaries from the Institution of Chartered Secretaries (London).
Split into simpler sentences: He had completed his studies in M.Com in Cost Accounting. He also passed his Diploma in Insurance from the Chartered Institution (London) and Chartered Secretaries from the Institution of Chartered Secretaries (London).