Assertion(A): Thermosetting plastic are gradually being substituted by thermoplastics for many engineering applications.
Reason(R): Thermosetting plastics are difficult process
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.