state gov UPSSSC Supply Inspector Mock Test 2022 Quantitative Aptitude Number System Integers

For what values of ‘x’ and ‘y’, the number xy + 1 will be a prime number?

1
x = 5 and y = 3
2
x = 2 and y = 6
3
x = 3 and y = 8
4
x = 4 and y = 2
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