यदि $a = \lim_{n \rightarrow \infty} \frac{1+2+3+\ldots+n}{n^2}$ और $b = \lim_{n \rightarrow \infty} \frac{1^2+2^2+3^2+\ldots+n^2}{n^3}$ है,तो

  • A
    $a = b$
  • B
    $2a = 3b$
  • C
    $a = 2b$
  • D
    $3a = 2b$

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