Detailed Explanation:

✅ Statement 1 – Correct: Cotton is a major Kharif crop sown with the onset of monsoon (June-July) requiring high temperature and 210 frost-free days.

✅ Statement 2 – Correct: Groundnut is a Kharif oilseed crop grown during the monsoon season in India.

✅ Statement 3 – Correct: Rice is the principal Kharif crop requiring high temperature (above 25°C), high humidity, and annual rainfall above 100 cm.

❌ Statement 4 – Incorrect: Wheat is a Rabi crop sown in winter (October-December) and harvested in spring (April-June), requiring cool growing conditions.