If A = {x: x is an odd natural number less than 20} and B = {y: y is a prime number less than 20}, then universal set for the above sets can be represented by _________.

If A = {x: x is an odd natural number less than 20} and B = {y: y is a

1.	If A = {x: x is an odd natural number less than 20} and B = {y: y is a prime number less than 20}, then universal set for the above sets can be represented by _________.
A.
B.
C.	None of these
Answer» D.

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If A = {x: x is an odd natural number less than 20} and B = {y: y is a prime number less than 20}, then universal set for the above sets can be represented by _________.

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