(1). A wall is built by 10 bricklayers not all of them have the same capacity to work. Every day exactly 2 bricklayers, do the work with no pair of bricklayers working together twice. Even after all possible pairs have worked once, all the bricklayers together works for two more days to finish the work. Find the number of days to finish the whole work?

• (a). 11
• (b). 10
• (c). 9
• (d). 8
• (e). None of these