A man whose blood group is not known meets with a serious accident and needs blood transfusion immediately. One of the following blood groups mentioned below and readily available in the hospital will be safe for transfusion. That is

Vinegar is chemically known as

Sodium chloried is the chemical name of

Dialysis is the treatment given to a patient suffering from

A green leaf placed in a dark room is illuminated by red light. The leaf will appear as

When white light undergoes dispersion the colour which suffers minimum deviation