Given below are two statements : one is labelled as Assertion A and other is labelled as Reason R
Assertion A : Isomorphous substitution is the source of constant charges on soil silicate clays.
Reason R : Cations of comparable size substitute each other in respective tetrahedral and octahedral sheets in silicate clays.
In light of the above statements, choose the correct answer from the options given below
1
Both A and R are true and R is the correct explanation of A
2
Both A and R are true but R is NOT the correct explanation of A
3
A is true but R is false
4
A is false but R is true