D. 6
ExplanationStep 1: Identify dot product. Step 2: In dot product same components multiply as 2×3=6. so the correct option follows. Step 3: In exam questions apply the formula first.
Step 1: dot product पहचानें। Step 2: dot product में same component multiply होते हैं 2×3=6। इसलिए सही विकल्प मिलता है। Step 3: ऐसे प्रश्नों में पहले सूत्र लगाएँ।
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