Which of the Following Statements Is True of the Constant

Multiple Choice

Which of the following statements is true of the constant and variable region of immunoglobulins?

A) Only light chains of immunoglobulins have both constant and variable regions.
B) Both light and heavy chains of immunoglobulins have constant and variable regions.
C) Only heavy chains of immunoglobulins have both constant and variable regions.
D) Neither light nor heavy chains of immunoglobulins have constant and variable regions.