The reservation for the Scheduled Castes and Scheduled Tribes in the service is provided in the Indian Constitution under Article 335. This article deals with the claims of the members of the Scheduled Castes and Scheduled Tribes for reservation in appointments or promotions to posts under the government. The provision recognizes that these communities have faced historical social and educational disadvantages, and therefore allows for the relaxation of qualifying marks, age limits, and other criteria to ensure their adequate representation in government services.

Option 1, Article 375, is not correct as it does not relate to reservation for Scheduled Castes and Scheduled Tribes in the service.

Option 2, Article 315, is not correct as it pertains to the composition of Public Service Commissions.

Option 4, Article 365, is not correct as it deals with the powers and responsibilities of the Governor in the states.

Therefore, the correct answer is option 3, Article 335.