Assertion: Cyclobutane is less stable than cyclopentane
Reason : The bond angles in cyclobutane and cyclopentane are `90^@` and `108^@`, respectively

Options

A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
C. Assertion is true but Reason is false
D. Assertion is false but Reason is true

Answer

A

Explanation

it is true that cyclo butane is less stable than cyclopentane because in cyclobutane the bond angle is less i.e., `90^@` whereas in cyclopentane bond angle is `108^@`. Due to this fact cyclobutane face more internal strain as compared to cyclopentane. Generally speaking.If bond angle is less internal strain is more hence,stability is less .