Correct Option
The correct option isHigh temperature and high humidity.
Explanation
"October Heat" is a distinct weather phenomenon observed in the Indian subcontinent during the retreating phase of the Southwest Monsoon (October–November). It represents the transition from the hot, wet rainy season to the cool, dry winter season.Detailed Analysis:
- Clear Skies and Temperature Rise: As the monsoon retreats, the clouds disappear, and the skies become clear. This allows for intense solar insolation, causing a sharp rise in day temperatures.
- High Humidity: Despite the cessation of rainfall, the land surface remains moist from the preceding monsoon season. This moisture evaporates, leading to high atmospheric humidity.
- Oppressive Weather: The combination of high temperature and high humidity creates a condition of oppressive and sultry weather, which is meteorologically termed "October Heat."
- Diurnal Variation: While the days are uncomfortably hot and humid, the nights generally become pleasant and cool as the temperature drops.
Key Takeaway: "October Heat" is characterized by the oppressive combination of high temperature and high humidity, occurring due to clear skies and moist ground conditions during the retreating monsoon season.