(A) Oxirane are cleaved under acidic and basic conditions.
(R ) The oxirane ring is strained and the tetrahedral bond angle `(109.5^(@))` is distorted t0 `61.5^(@)`.
A. If both (A) and (R ) are correct and (R ) is correct explanation of (A ).
B. If both (A ) and (R ) are correct but (R ) is not correct explanation of (A ).
C. If (A) is correct but (R ) is incorrect
D. If (A) is incorrect but (R ) is correct.