मान लीजिए $a = \lim_{x \to 1} \left( \frac{x}{\ln x} - \frac{1}{x \ln x} \right)$,$b = \lim_{x \to 0} \frac{x^3 - 16x}{4x + x^2}$,$c = \lim_{x \to 0} \frac{\ln(1 + \sin x)}{x}$,और $d = \lim_{x \to -1} \frac{(x + 1)^3}{3(\sin(x + 1) - (x + 1))}$. तो आव्यूह $\begin{bmatrix} a & b \\ c & d \end{bmatrix}$ है:

• A
  Idempotent (वर्गसम)
• B
  Involutary (अ involutory)
• C
  Non-singular (अव्युत्क्रमणीय)
• D
  Nilpotent (शून्यंभावी)