B. (0 7) / (0 7)
ExplanationStep 1: Compare with x² = 4ay. Step 2: 4a=28 so a=7 and focus is (0 7). Step 3: x² = 4ay opens upward.
Step 1: x² = 4ay से compare करें। Step 2: 4a=28 इसलिए a=7 और focus (0 7) है। Step 3: x² = 4ay ऊपर खुलने वाला parabola है।
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