a - [a - {a - (a - 1)}] = ?

a - [a - {a - (a - 1)}] = ?

A 1

B a

C a - 1

D a + 1

Solution

Correct Answer: Option A

a - [a - {a - (a - 1)}]
= a - [a - {a - a + 1}]
= a - [a - {1}]
= a - [a - 1]
= a - a + 1
= 1