Concept:The pattern multiplies the two numbers, then doubles the product and adds one.Explanation:For 2×3=13: First, 2×3=6. Then 6×2=12, and 12+1=13.For 4×5=41: First, 4×5=20. Then 20×2=40, and 40+1=41.Similarly, for 6×7: First, 6×7=42. Then 42×2=84, and 84+1=85.Answer:The correct answer is 85, which corresponds to Option D.