Which statement `(s)` is/are wrong about the interconversion of trans `-` and `cis-` isomeric alkenes by ultraviiolet radiation with a suitable photosensitiser ?

Options

A. `U.V.` radiation provides energy to excit `pi bar(e)` into an anti`-` bonding `pi` molecular orbital `(pi ^(**) ABMO)` momentarily breaking the `pi-` bond.
B. Rotation about the `(C-C)` single bond of either excited `cis-` or trans `-` molecule gives a common non `-` planar intermediat. When the `bar(e)` returns to the ground state, the `pi-`bond reforms and the same mixture of the two geometric isomers results from either starting isomer.
C. Because the rate of return from the common intermediat to the cis`-` ground state is faster , the `cis-`predominates even though is has the higher energy. The product ratio is kinetically controlled and not thermodynamically controlled.
D. Because the rate of return from the common intermediate to the trand `-` ground state is faster, the trans`-` predominates and has lesser energy. The product ratio is thermodynamically controlled and not kinetically controlled.

Answer

d.