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Let Z denote the set of all integer...

Let Z denote the set of all integers and `A = { (a,b) : a^2 +3b^2 = 28 ,a,b in Z }` and ` B= {(a,b ):a gt b, in Z}` . Then the number of elements in ` A nn B ` is

A

2

B

3

C

4

D

6

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The correct Answer is:
D
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