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Solution
Expression : $$sec^4 θ - sec^2 θ tan^2 θ$$
= $$sec^2\theta(sec^2\theta-tan^2\theta)$$
$$\because (sec^2\theta-tan^2\theta=1)$$
= $$sec^2\theta(1)=sec^2\theta$$
=> Ans - (B)
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