Which is one of these is the best for acne treatment and smoothing the skin
Erythromycin lotion
Benzol peroxide
vitaminA acid cream

Here is an abstract of two of your choices:

Ninety three patients suffering from acne vulgaris were treated with 0.05% retinoic acid (23 patients), 10% benzyoyl peroxide (24 patients), 2% erythromycin lotin (25 patients) and 50% glycerine in methylated spirit (21 patients) used as a control, for a period of 6 weeks. The patients were evaluated at 2 weeks and 6 weeks by spot counting of the lesions and diagrammatic representations. Good to excellent results were obtained in 69.6% of patients of erythromycin lotion. Retinoic acid was more effective in reducing noninflammatory lesions (75.2%) whereas inflammatory lesions showed better response (73.6%) with erythromycin lotion and benzoyl peroxide was almost equally effective in both types of lesions.