Match the types of antibodies with their function and/or where each is found. (p. 635)
(1) associated with allergic reactions
A. $\lg A$
(2) important in B cell activation, on surfaces
B. $\lg M$ of most B cells
C. $\lg \mathrm{G}$
(3) activates complement, anti-A and
D. $\lg \mathrm{D}$ anti-B in blood
(4) effective against bacteria, viruses, toxins
E. $\lg \mathrm{E}$ in plasma and tissue fluids
(5) in exocrine secretions, including breast milk