Assertion (A): Infectious free RNA that caused potato spindle tuber disease was named as viroid Reason (R): It was named so because the RNA of the viroid was of low molecular weight.

Question

( a ) A is correct but R is incorrect
( b ) A is incorrect but R is correct
( c ) Both A and R are correct & R is not the correct explanation for A
( d ) Both A and R are correct but R is the correct explanation for A