Choose the correct combination 
a) Hepatic cacae - At the junction of forgut and mid gut externally
b) Malphigian tubules - At the junction of mesenteron and hindgut externally
c) Stomodeal value - prevent regurgitation from forgut to mesenteron
d) Sphineter muscle - prevent regurgitation of undigested food from midgut to hindgut 

Options

A. a & b
B. b & c
C. c & d
D. a & c

Answer

A