Activity question 7) week 1.10

[Chinmay Bhobe]

Let P be a subset of [(S×S)∖R]. What is the set of possible cardinalities of P?

a) {1,2,3,4,5,6,7,8,9,10,11,12}

b){}

c) {1,2,3,4,5,6,7,8,9,10,11}

d) {0,1,2,3,4,5,6,7,8,9,10,11,12}

how is the answer d.it should be a right 

since P is a subsey it has to have elements of [(S×S)∖R]

please help

Thank you

[Chinmay Bhobe]

ohh wait empty set is a subset also....my bad