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Electronics and Communication Digital Electronics Difficulty: Medium

One of the given statements is true for intermodal dispersion. Choose the right one. Consider the sequence x[n] = {-4 - j5, 1 + j2, 4} The conjugate antisymmetric part of the sequence is Match List-I with List-II and select the correct answer using the options given below: List-I List-II a. Hexagonal crystal 1. a = b = c; γ = α = β ≠ 90º b. Rhombohedral crystal 2. a = b ≠ c; α = β = 90º; γ = 120º c. Triclinic crystal 3. a ≠ b ≠ c; α = β ≠ γ ≠ 90º d. Monoclinic crystal 4. a ≠ b ≠ c; α ≠ γ ≠ 90º ≠ β If the variance $$\sigma _x^2$$ of d(n) = x(n) - x(n - 1) is one-tenth the variance $$\sigma _x^2$$ of a stationary zero-mean discrete-time signal x(n), then the normalized autocorrelation function $$\frac{{{R_{xx}}\left( K \right)}}{{\sigma _x^2}}$$ at K = 1 is PPI scan type radar display can