Cytoplasm in a plant cell will shrink if the cell is
1. placed in a concentrated salt solution
2. kept warm and moist and in medium light
3. placed in distilled water
4. exposed to a different concentration of nitrogen gas

1 is the answer

Explanation:

Well, this is a tricky question indeed. Theoritically speaking, it's true that a cytoplasm will shrink because the entropy of the system will tend to balance the salt concentration between the two sides of the membrane. This process is called osmosis and sooner or later, both sides will be balanced in terms of salt concentration. However, remember that plants (actually organisms) have the homeostasis system which does not let these things happen.