Budgetary slack is:

C->>>>>>>>>>>>1&2 are correct 

Budgetary slack can take one of two forms: It can either underestimate the amount of income or revenue that will come in over a given amount of time, or overestimate the expenses that are to be paid out over the same time period.

Answer option    C

Budgetary slack is underestimation of planned revenue and expenditure in the same time period.

c-

both of  underestimation planned revenue and Overestimation planned cost