If S1 is the sum of an arithmetic progression of ‘n’ odd number of terms and S2 is the sum of the terms of the series in odd places, then S1/S2

• ক nn+1nn+1
• খ 2n/n+1 ✅ সঠিক উত্তর
• গ n+12nn+12n
• ঘ n−1nn−1n