If y = sin(√(x² + 1)), find dy/dx.

Options

• Option A

  x cos(√(x² + 1))/√(x² + 1)

• Option B

  2x cos(√(x² + 1))

• Option C

  cos(√(x² + 1))/√(x² + 1)

• Option D

  -x sin(√(x² + 1))/√(x² + 1)