If ${I_1} = \int {{{\sin }^{ - 1}}x\,dx} $ and ${I_2} = \int {{{\sin }^{ - 1}}\sqrt {1 - {x^2}} } dx$,then:

  • A
    ${I_1} = {I_2}$
  • B
    ${I_2} = \frac{\pi }{2}I_1$
  • C
    ${I_1} + {I_2} = \frac{\pi }{2}x$
  • D
    ${I_1} + {I_2} = \frac{\pi }{2}$

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