Subject :IMO Class : Class 8

Which of the following is the factor of
4a^{2} + b^{2} – 4ab + 2b – 4a + 1 ?

A(a – b)

B(a + b – 2)

C(a – b + 2)

D(2a – b – 1)

Subject :IMO Class : Class 8

^{2} + b^{2} – 4ab + 2b – 4a + 1 ?

A(a – b)

B(a + b – 2)

C(a – b + 2)

D(2a – b – 1)