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As per your syllabus, Math, what is the FORMULA for the sum of the first n natural numbers?

ASₙ = (n + 1)² / 2
BSₙ = n(n + 1) / 2
CSₙ = n²
DSₙ = n(n − 1) / 2
Answer & Solution
Correct answer: B. Sₙ = n(n + 1) / 2
As per your syllabus, Sₙ = 1 + 2 +... + n = n(n+1)/2. The other formulas misstate.
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