| Enzymes | class of enzymes |
| (a) Lactate dehydrogenase | (i) Isomerases |
| (b) Alanine racemase | (ii) Transferases |
| (c) Lipase | (iii) Oxidoreductases |
| (d) Hexokinase | (iv) Hydrolases |
The graph showing the concept of activation energy of enzyme is given below. Observe the graph and choose the correct option for M and N.

A particle dispersoid has 1510 spherical particles of uniform density. An air purifier is proposed to be used to remove these particles. The diameter-specific number of particles in the dispersoid, along with the number removal efficiency of the proposed purifier is shown in the following table:
The overall mass removal efficiency of the proposed purifier is ________% (rounded off to one decimal place).