Match List I with List II.
List I | List II | ||
| A | Taenia | I | Nephridia |
| B | Paramoecium | II | Contractile vacuole |
| C | Periplaneta | III | Flame cells |
| D | Pheretima | IV | Urecose gland |
Choose the correct answer from the options given below:
Which of the following statement(s) is/are correct about the given compound?

Identify 'P' and 'Q' in the following reaction
