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Let two straight lines drawn from the origin O intersect the line 3x + 4y = 12 at the points P and Q such that ∆ OPQ is an isosceles triangle and ∠ POQ = 90°. If l = OP 2 + PQ 2 + QO 2 , then the greatest integer less than or equal to l is :

1. 44
2. 48
3. 46
4. 42

Correct answer: 46

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