A book is lying on the table. What is the angle between the action of the book on the table and the reaction of the table on the book

Q: A book is lying on the table. What is the angle between the action of the book on the table and the reaction of the table on the book

(a) 0°

(b) 30°

(c) 45°

(d) 180°

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Ans: (d)