If R = {1, 3, 5, 7, 9, 11, 13}, then which of the following is not a subset of R ?
{1, 9, 5, 13} and {5, 11, 1} are subsets of R as they contain only those elements that are in R .
Null set is a subset of any set. So, {} is a subset of R .{0} is not a subset of R as 0 is not an element of set R .