1-(a-(a-(a-(a-1)))) = ?

A 4a-1

B 1

C a

D 0

Solution

Correct Answer: Option D

  1-(a-(a-(a-(a-1)))) 

= 1 - (a - (a - (a - a + 1))) 

= 1 - (a-(a - 1)) 

= 1 - (a - a + 1) = 1 - 1 = 0 

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