Recall that a test is statistically significant at a particular significance level if the null hypothesis is rejected. If a test is statistically significant at 5% level of significance, then

we cannot determine if the null hypothesis would be rejected at any other level of significance.
the null hypothesis will also be rejected at 1% level of significance.
the null hypothesis will not be rejected at 10% level of significance
the null hypothesis will also be rejected at 10% level of significance
the null hypothesis will not be rejected at 1% level of significance.