A block A kept on a rough plate (OO(I)) ...

A block A kept on a rough plate `(OO_(I))` with coefficient of static friction `mu_(s)=0.75` & coefficient of kinetic friction `mu_(hat(k))=0.5`. The plate is leaning with horizontal at an angle `theta=tan^(-1)(mu'_(s))`. If the plate is further tilted slightly then the acceleration of block will be :

`1.5 m//s^(2)`

`2 m//s^(2)`

`2.5 m//s^(2)`

None of these

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