Write with reasons whether the following pair of sets are equal or not,
`A=phi` and `B ={phi}`

Write with reasons whether the following pair of sets are equal or not, P={1} and Q{ x:x is a digit of the number 111},

Find whether the given pair of sets are equal or not: C=phi,D={phi},

State with reasons whether the sets defined in each of the following cases are equal : X=phi, Y={phi}

Write down all the subsets of the following sets phi

Write down all the subsets of the following sets phi

Write down all the subsets of the following sets phi

Write down all the subsets of the following sets phi

Write down all the subsets of the following sets phi

Write down all the subsets of the following set :- phi