Both A and R are true and R is correct explanation of A.

Both A and R are true and R is not a correct explanation of A.

A is true but R is false.

A is false but R is true.

burning of lime stone

burning of kankar

adding water to quick lime

calcination of pure clay

calcium oxide

silica

clay

water

(i) and (iv)

(ii) and (iii)

(i) and (ii)

(iii) and (iv)

lime and silica

lime and alumina

silica and alumina

lime and iron