Chapter 18, Problem 4MC

Farmer’s lung is a hypersensitivity pneumonitis resulting from _________.

1. a. a type I hypersensitivity reaction to grass pollen
2. b. a type II hypersensitivity to red cells in the lung
3. c. a type III hypersensitivity to mold spores
4. d. a type IV hypersensitivity to bacterial antigens
5. e. none of the above