MCQs are order of the day and you are going to face these in many exams. MCQs are made in such a way that no important aspect is missed out. Any student taking a test and getting more than 90% marks here, will surely get similar marks in board exam. Take your exam your self and find out how prepared you are for your exam. If you fail here you will fail in your exam as well. What one forms the respiratory surface in human body? Which function is not performed by the fluid enclosed by the lung membranes?