The correct answer is: A. 15th and 25th day of a month.
The State Government of Jharkhand has decided to observe Rice Day on the 15th and 25th day of every month. This is to commemorate the importance of rice in the state’s economy and culture. Rice is the staple food of Jharkhand and is grown in most parts of the state. It is also a major source of employment for the people of Jharkhand. The state government has decided to observe Rice Day as a way to promote the cultivation of rice and to celebrate the state’s rich rice culture.
Option B is incorrect because the 5th and 10th day of a month are not special days in Jharkhand. Option C is incorrect because the 10th and 15th day of a month are not special days in Jharkhand. Option D is incorrect because the 25th and 30th day of a month are not special days in Jharkhand.