Which of the following are associated with an increased DLCO?

a. Goodpasture's syndrome and idiopathic pulmonary hemosiderosis
b. Goodpasture's syndrome and Churg-Strauss syndrome
c. Churg-Strauss syndrome and LAM
d. Idiopathic pulmonary hemosiderosis and COP

A
An increased DLCO is associated with Goodpasture's syndrome and idiopathic pulmonary hemosiderosis.