Assertion A : Enol form of acetone $[C H_{3} C O C H_{3}]$ exists in < 0.1% quantity. However, the enol form of acetyl acetone $[C H_{3} C O C H_{2} C O C H_{3}]$ exists in approximately 15% quantity.
Reason R : enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone.

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A is false but R is true

A is true but R is false

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is not the correct explanation of A

answer is B.

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Detailed Solution

Enol form of acetoacetate can undergo intra molecular hydrogen bonding and form a cyclic molecule which possess less energy and more stability.

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