Assertion (A): CHBr = CHCl has geometrical isomers but CH₂Br - CH₂Cl has no geometrical isomers. Reason (R): For geometrical isomers, the presence of C = C is essential.
1: Both assertion (a) and reason (r) are true, and reason (r) is the correct explanation of assertion (a).
2: Both assertion (a) and reason (r) are true, but reason (r) is not the correct explanation of assertion (a).
3: Assertion (a) is true, but reason (r) is false.
4: Assertion (a) is false, but reason (r) is true.
