Q. In which one of the following options the two examples are correctly matched with their particular type of immunity? Examples Type of immunity (a) Polymorphonuclear leukocytes Cellular barriers and monocytes (b) Anti-tetanus and anti-snake bite Active immunity injection (c) Saliva in mouth and tears in eyes Physical barriers (d) Mucus coating of epithelium lining Physiological barriers the urinogenital tract and the HCl in stomach 1. (a) 2. (b) 3. (c) 4. (d) [NEET 2012 ]