Correct answer
D. Both A. and B.
Explanation
The correct answer is Both A. and B..
Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature?
________ functions are exemplified by heat and work?
When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as________?
Transistor parts and refrigerator components are normally made of________?
Removal of ________ results from the disinfection of water?
Wet sieving is employed, when the product contains ________ materials?