Answer:
a.{2,13,23}
Step-by-step explanation:
set h is defined as h={x|x is prime}
Some prime numbers are
2, 3, 5, 7, 11, 13, 17, 19, 23 ,29,31 and so on
a.{2,13,23} : 2, 13 and 23 are the prime numbers so they are the subset of h
b.{x|x is an integer} : all the integers are not prime numbers so it is not a subset of h
c.{x|x is odd}: all the odd numbers are not prime numbers so it is not a subset of h
d.{1,2,3,4}: 4 is not a prime number so it is not a subset of h
