Pick up the adverse effects of soil moisture stress on plant growth:
1.Loss of turgidity 2. Decrease in photosynthesis 3. Increase in respiration 4. Decrease in proline content

Correct option is D

Under moisture stress, plants lose turgidity, photosynthesis decreases, and respiration rate increases. Proline content actually increases as a stress response, not decreases. Hence statements 1, 2 and 3 are correct.