The correct answer is: A. 0.65 kN/m2
The live load for a sloping roof with slope 15°, where access is not provided to roof, is taken as 0.65 kN/m2. This is according to the International Residential Code (IRC), which is a model building code that is used in many jurisdictions in the United States. The IRC defines live load as the weight of people, furniture, and other movable objects that are expected to be on a structure. The live load for a sloping roof is lower than the live load for a flat roof because there is less likelihood of people or objects being on a sloping roof.
Option B is incorrect because it is the live load for a flat roof with access. Option C is incorrect because it is the live load for a sloping roof with a slope of 30°. Option D is incorrect because it is the live load for a roof with a snow load.