Captain (Retd) Abdus Sabur Khan, Chairman of Opsonin Pharma Limited presided over its ‘Annual Sales Conference 2017’ at a city convention center on Monday. Abdur Rouf Khan, Managing Director, Abdur Rakib Khan, Deputy Managing Director, Syed Golam Rahman, Director Marketing and Sales and Abdul Momen Talukder, General Manager Sales of the company were present among others.