Which of the following statements is wrong ?

Options

A. (a) The decreasing order of the numerical value of heat of combustion is:

B. (b) Cycloalkanes are planar.
C. (c) Cyclopropane has higher heat of combustion per methylene `(--CH_(2)--)` group than that of cyclobutane.
D. (d) With the exception of cyclopropane, cycloalkanes are non-planar.

Answer

B

Explanation

i. More the number of C atoms, more is the heat of combustion. So, the correct order is (a).
ii. Cyclopropane has the highest heat of combustion per `(CH_(2))` group.
iii. Except cyclopropane, cycloalkanes are non-planar. So, the answer is (b).