A block \( \mathrm{P} \) of mass \( \mathrm{m} \) is placed on a frictionless horizontal surface...

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A block \( \mathrm{P} \) of mass \( \mathrm{m} \) is placed on a frictionless horizontal surface. Another block \( Q \) of same mass is kept on \( \mathrm{P} \) and connected to the wall with the help of a spring of spring constant \( \mathrm{k} \) as shown in the
P figure. \( \mu_{\mathrm{s}} \) is the coefficient of friction between \( P \) and \( Q \). The blocks move together performing SHM of amplitude \( A \). The maximum value of the friction force between \( P \) and \( Q \) is :-
W.
(A) \( k A \)
(B) \( \frac{k A}{2} \)
(C) zero
(D) \( \mu_{s} m g \)
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