C-02-Q168mediumsingle_mcq
In the "hand test" for pond natural food, if the palm is not visible after dipping up to elbow, it indicates —
In the "hand test" for pond natural food, if the palm is not visible after dipping up to elbow, it indicates —
- aLess natural food
- bOptimum food
- cPollution
- dAcidic water