Given a real valued function y (t) with period T. Its trigonometric Fourier series expansion contains no term of frequency = 2 ( frac{(2k)}{T} ); where, k = 1, 2 .. Also no terms are present. Then, y(t) satisfies the equation ____________

• A. y (t) = y (t+T) = -y (t+ ( frac{T}{2} ))
• B. y (t) = y (t+T) = y (t+ ( frac{T}{2} ))
• C. y (t) = y (t-T) = -y (t- ( frac{T}{2} ))
• D. y (t) = y (t-T) = y (t- ( frac{T}{2} ))