As south India is close to the equator hence you will not find extreme temperature differences here.
therefore the correct answer is 'D'.

South India is known for its unique geographical and climatic characteristics. Let's analyze each given option to understand why option 'D' is not a fact regarding South India.

a) Diurnal range of temperature is less here:
- The diurnal range of temperature refers to the difference between the maximum and minimum temperatures in a day.
- In South India, the diurnal range of temperature is generally low due to the proximity to the ocean and the presence of dense vegetation cover.
- The sea breeze and the Western Ghats act as natural barriers, preventing extreme temperature variations.
- This leads to relatively stable temperatures throughout the day, with minimal fluctuations.

b) Annual range of temperature is less here:
- The annual range of temperature refers to the difference between the maximum and minimum temperatures in a year.
- South India experiences a relatively low annual range of temperature.
- The region is located close to the equator, resulting in a tropical climate with consistent temperatures throughout the year.
- The moderating influence of the ocean and the Western Ghats further contribute to the reduced annual temperature range.

c) Temperatures here are high throughout the year:
- South India is characterized by a hot and humid climate, with temperatures remaining high throughout the year.
- Due to its proximity to the equator, the region receives abundant sunlight, leading to warm temperatures.
- The average annual temperature in South India ranges between 25°C to 35°C (77°F to 95°F).
- Summers can be particularly hot, with temperatures occasionally exceeding 40°C (104°F) in some areas.

d) Extreme climatic conditions are found here:
- This statement is not a fact regarding South India.
- South India generally experiences a moderate climate with no extreme weather conditions.
- The presence of the Western Ghats acts as a barrier against cyclones and severe storms originating from the Arabian Sea.
- While occasional monsoon rains and tropical cyclones can occur, they are not as frequent or severe as in other parts of India.

In conclusion, the correct answer is option 'D' because extreme climatic conditions are not found in South India. The region has a moderate climate with stable temperatures, low diurnal and annual temperature ranges, and a relatively low occurrence of extreme weather events.