Which part of India experiences the highest diurnal range of temperature and why?

(i) Diurnal range of temperature is the difference between maximum and
minimum temperature of a day.
(ii) Diurnal range of temperature is high in desert regions like Rajasthan,
Thar Desert and interior parts of Rann of Kutch.
(iii) In these sandy areas, the day temperature may rise to 50′ and drop
down to near freezing point the same night’
(iv) It is so because the sand absorbs heat very fast during day and loses heat
very fast at night.