We first check whether the pedigree is sex-linked. If not then it is taken as autosomal. The trait is not Y-linked as in Y linked, only males are affected. The trait could be X-linked. But, it is not X-linked recessive because there are no generation skips. Hence, it could be X-linked dominant. The female in the parent is unaffected and the male has only one X chromosome, so the genotypes could be XX and X$${c}$$X. But since in the next generation both the females are not similarly affected according to the above cross, the trait must be autosomal.  In autosomal traits, both males and females are affected equally regardless of their sex.  So, the correct option is 'autosomal'.