The questions given below consist of Assertion (A) and Reason (R ) . Use the following key to select the correct answer. Assertion : Tetrahedral compl

The questions given below consist of Assertion (A) and Reason (R ) . Use the following key to select the correct answer.
Assertion : Tetrahedral complexes donot show geometrical isomerism
Reason : The relative positions of the ligands in the tetrahedral complexes are the same with respect to each other .
A. If both assertion and reason are correct and reason is correct explanation for assertion .
B. If both assertion and reason are correct but reason is not correct explanation for assertion .
C. If assertion is correct but reason is incorrect
D. If both assertion and reason are incorrect