In your project, you have assigned a senior tester in your team as the SCM coordinator for the project. The associate has taken up the following activities. Which of the following are valid activities for his role as SCM coordinator?

$1.$ Identify and document version control mechanism

$2.$ Define change management procedure

$3.$ Responsible for performing causal analysis

$4.$ Conducts retrospection meeting

What is the correct answer $-$

a$.1$ and $2$

b$.3$ and $4$

c$.1,2$ and $3$

d$.1,2$ and $4$