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Let X and Y be two independent random variables. Which one of the relations between expectation (E), variance (Var) and covariance (Cov) given below is FALSE?

Let X and Y be two independent random variables. Which one of the relations between expectation (E), variance (Var) and covariance (Cov) given below is FALSE? Correct Answer E(X<sup>2</sup>Y<sup>2</sup>) = (E(X))<sup>2</sup> (E(Y))<sup>2</sup>

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দুটি দৈব চলক যথাক্রমে x ও y যাদের প্রত্যাশিত মান যথাক্রমে E(x) ও E(y) হলে, সহভেদাঙ্কের সূত্র-i. Cov (x, y) = E{x-E(x)} {y-E(y)}ii. Cov (x, y) = E(xy) - E(x) E(y)iii. Cov (x, y) = E{x-E(x)) E(y-E(y))নিচের কোনটি সঠিক?
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Facts related to public relations are given below
1. Internal relations
2. Customer relations
3. Concept of public relations
4. Internal coordination
Which of the above given is/are types of public relations?
Assertion (A): When there is an evidence of a linear relationship between two variables, it may not always mean an independent-dependent relationship between the two variables.
Reason (R): The casual relationship between the two variables may not imply a reasonable theoretical relationship between the two.