A porous pellet with $Pt$ dispersed in it is used to carry out a catalytic reaction. Following two scenarios are possible.

$Scenario\:1$ : $Pt$ present throughout the pores of the pellet is used for catalyzing the reaction.

$Scenario\:2$ : $Pt$ present only in the immediate vicinity of the external surface of the pellet is used for catalyzing the reaction.

At a large value of Thiele modulus, which one of the following statements is $TRUE$?

1. Since the reaction rate is much greater than the diffusion rate, $Scenario\:1$ occurs
2. Since the reaction rate is much greater than the diffusion rate, $Scenario\:2$ occurs
3. Since the reaction rate is much lower than the diffusion rate, $Scenario\:1$ occurs
4. Since the reaction rate is much lower than the diffusion rate, $Scenario\:2$ occurs