In cockroaches,at the junction of $............$ and $............$,about $............$ yellow-colored,thin,thread-like Malpighian tubules are present.

• A
  midgut and hindgut,$50 - 100$
• B
  midgut and hindgut,$100 - 150$
• C
  foregut and midgut,$50 - 100$
• D
  foregut and midgut,$100 - 150$