B. 12 / 12
ExplanationStep 1: nP1 means arranging 1 object from n objects. Step 2: 12P1 = 12. Step 3: nP1 is always equal to n.
Step 1: nP1 का अर्थ n objects में से 1 arrange करना है। Step 2: 12P1 = 12 होता है। Step 3: nP1 हमेशा n के बराबर होता है।
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