Answer: C) c-type conflict
Explanation: C-type conflict is type of cognitive dispute that occurs between the team members of an organization or any other party where the difference in opinion on any subject leads to disagreement in team mates.
According to the situation mentioned in the question, senior lawyers do not have same opinion on leave policy and because of that dissimilarity is caused that leads them to find an appropriate solution by discussion.
Other options are incorrect because a-type conflicts are dispute in relation with personal case. Channel conflict happens in marketing field. Affective conflict is related with emotions.
Thus, the correct option is option(C).