The reaction(s) leading to the formation of 1,3,5-trimethylbenzene among the following is (are)(consider even minor product if they can form under the boundary of the concept)?

In this reaction actually the major product is ortho and para but we can also get meta as minor product and which on further reaction gives  desired product.

Three moles of acetone undergoes aldol condensation reaction and give mesitylene. (1,3,5-trimethylbenzene )