a = 1, b = -1, c = 2, d = -2 হলে a - (-b) - (-c) - (-d) -এর মান কত ?
A 0
B 1
C 2
D 3
Correct Answer: Option A
a-(-b)-(-c)-(-d) = a+b+c+d = 1+(-1)+2+(-2) = 1 - 1 + 2 - 2 = 0
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