Which among the following is an example of a zero order reaction?

For a general reaction $A \to B$,a plot of the concentration of $A$ versus time is given in the figure. Answer the following questions based on this graph:
$(i)$ What is the order of the reaction?
$(ii)$ What is the slope of the curve?
$(iii)$ What are the units of the rate constant?

For the reaction $R \rightarrow P$,the concentration of $R$ is measured as a function of time and the following data is obtained:

$[R] \ (M)$	$1.0$	$0.76$	$0.40$	$0.10$
$t \ (min)$	$0.0$	$0.05$	$0.12$	$0.18$

The order of the reaction is:

What is the correct relation between rate constant and half-life for a zero order reaction?

Which of the following are the correct representations of a zero order reaction,where $[A]$ represents the reactant concentration and $[A]_0$ represents the initial concentration?

$A$ reaction $2A \to$ products is found to follow zero order kinetics,then