B. (0 5) / (0 5)
ExplanationStep 1: Compare with x² = 4ay. Step 2: 4a=20 so a=5 and focus is (0 5). Step 3: x² = 4ay opens upward.
Step 1: x² = 4ay से compare करें। Step 2: 4a=20 इसलिए a=5 और focus (0 5) है। Step 3: x² = 4ay ऊपर खुलने वाला parabola है।
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