A. 2
ExplanationStep 1: Identify degree. Step 2: The highest derivative dy/dx has power 2, so degree is 2. so the correct option follows. Step 3: In exam questions apply the formula first.
Step 1: degree पहचानें। Step 2: highest derivative dy/dx की power 2 है इसलिए degree 2 है। इसलिए सही विकल्प मिलता है। Step 3: ऐसे प्रश्नों में पहले सूत्र लगाएँ।
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