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If sqrt a + sqrt b is an irrational numb...

If `sqrt a + sqrt b` is an irrational number, then which of the following is false?

A

1. a'and 'b' are prime

B

2. a' or 'b' is prime

C

3. a' and 'b' are any integers

D

4. one of 'a' or 'b' is not a perfect square

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