The co-efficient of \( x^{4} \) in the expansion of \( \left(1-x+2 x^{2}\right)^{12} \) is (1) \( { }^{12} C _{3} \) \( (2)^{13}

The co-efficient of \( x^{4} \) in the expansion of \( \left(1-x+2 x^{2}\right)^{12} \) is (1) \( { }^{12} C _{3} \) \( (2)^{13} C _{3} \) (3) \( { }^{14} C _{4} \) (4) \( { }^{12} C _{3}+3{ }^{13} C _{3}+{ }^{14} C _{4} \)

The co-efficient of \( x^{4} \) in the expansion of \( \left(1-x+2 x^{2}\right)^{12} \) is (1) \( { }^{12} C _{3} \) \( (2)^{13} C _{3} \) (3) \( { }^{14} C _{4} \) (4) \( { }^{12} C _{3}+3{ }^{13} C _{3}+{ }^{14} C _{4} \)

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