Which one of the following pairs of the kind of cells and their secretion are correctly matched?

• A
  Oxyntic cells $-$ $A$ secretion with $pH$ between $2.0$ and $3.0$
• B
  Alpha cells of islets of Langerhans $-$ Secretion that decreases blood sugar level
• C
  Kupffer cells $-$ $A$ digestive enzyme that hydrolyses nucleic acids
• D
  Sebaceous glands $-$ $A$ secretion that evaporates for cooling