The correct sequence of these tool materials in increasing order of the their ability to retain their hot hardness is

Question

Consider the following tool materials:

1. Carbide                       2. Cermet

3. Ceramic                      4. Borazon

The correct sequence of these tool materials in increasing order of the their ability to retain their hot hardness is

(a) 1,2,3,4                       (b) 1,2,3,4

(c) 2,1,3,4                       (d) 2,1,4,3