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.

Match the column-I with column-II. Choose the correct option given below.

Match Column-I with Column-II and choose the correct option given below: 
Match the following:
In the following, \( [x] \) denotes the greatest integer less than or equal to \( x \). 
Choose the correct answer from the options given below:
For x < 0:
f(x) = ex + ax
For x ≥ 0:
f(x) = b(x - 1)2