The correct option is Kerala and Karnataka.
Explanation
Towards the end of the summer season, pre-monsoon showers become a common occurrence in various parts of India. These rains are often associated with thunderstorms and are known by distinct local names based on the region and their specific impact on local agriculture.
Detailed Analysis:
- Kerala and Karnataka: The pre-monsoon showers in these states are locally known as Mango Showers. This nomenclature arises because these rains facilitate the early ripening of mangoes. In Karnataka, they are also occasionally referred to as Blossom Showers due to their beneficial effect on coffee blossoms.
- West Bengal and Assam: In these eastern regions, pre-monsoon storms are known as Kal Baisakhi (Calamity of the month of Baisakh) or Nor'westers. In Assam, they are specifically termed Bardoli Chheerha.
- Punjab and Haryana: These regions typically experience hot, dry, and oppressing winds known as Loo during the summer, rather than the phenomenon specifically termed Mango Showers.
Key Takeaway: Mango Showers are specific pre-monsoon rainfall events occurring in Kerala and Karnataka that aid in the ripening of the mango crop.