Which colour is generally obtained by mixing red and blue?

Correct answer: Violet

The governing concept is the traditional paint colour model in which pairs of primary colours produce secondary colours. Red combined with blue generally produces violet or purple, so option C is correct. Orange comes from red and yellow, while green comes from blue and yellow; yellow itself is not produced by mixing these two paints. Exact results can vary slightly with pigments, but violet is the expected school-level answer.