If A=[[a+i b, c+i d],[-c+i d, a-i b]] an...

If `A=[[a+i b, c+i d],[-c+i d, a-i b]] and a^2+b^2+c^2+d^2=1,t h e n ,A^(-1)` is equal to a.`[[a+i b,-c+i d],[c+i d, a-i b]]` b. `[[a-i b,-c-i d],[-c-i d, a+i b]]` c. `[[a+i b,-c-i d],[-c+i d, a-i b]]` d. none of these

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