Identify the following sets as null set or singleton set.
A = `{x:x inNN,1ltxlt2}`

Identify the following sets as null set or singleton set. C = {0}.

Identify the following sets as null set or singleton set. (i) A={x: x in N, 1 lt x lt 2} (ii) B=The set of all even natural numbers which are not divisible by 2 (iii) C={0}. (ic) D=The set of all triangles having four sides.

Which of the following is a null set

Which of the following is a null set ?