a - [2b - {3c - (a - 2b + 3c)}] এর মান কত?

A a + b

C a + b + c

D c

Solution

Correct Answer: Option B

a - [2b - {3c - (a - 2b + 3c)}]
= a - [2b - {3c - a + 2b - 3c}]
= a - [2b - { - a + 2b}]
= a - [2b + a - 2b]
= a - [a] 
= a - a
= 0

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