Option 1 -> This is the marginal propensity to consume (MPC), not autonomous consumption.
Option 2 -> This is the constant term in the consumption function, representing autonomous consumption.
Option 3 -> This value has no relevance to the given consumption function.
Option 4 -> This value has no relevance to the given consumption function.
Hence, Option 2: 50 -> In the consumption function C = 50 + 0.5Y, autonomous consumption is the constant term (50). It represents the level of consumption that occurs even when income (Y) is zero. This is the minimum consumption required for basic necessities, regardless of income level. The 0.5 coefficient represents the marginal propensity to consume (MPC), which shows how much consumption increases for each additional unit of income. -> correct