Pick the odd one out with respect to excretion in invertebrates.
Contractile vacuole, kideys, Cell membrance, excretory tubes.

Explanation

To solve the question of picking the odd one out with respect to excretion in invertebrates, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- Contractile vacuole
- Kidneys
- Cell membrane
...