Option 1: 1, 2, 3, and 4 - This option suggests that the Human Poverty Index (HPI) is based on all four deprivations mentioned in the question: income deprivation, literacy deprivation, social services deprivation, and employment deprivation.

Option 2: 1, 2, and 3 only - This option suggests that the HPI is based on three out of the four deprivations mentioned: income deprivation, literacy deprivation, and social services deprivation.

Option 3: 1, 3, and 4 only - This option suggests that the HPI is based on three out of the four deprivations mentioned: income deprivation, social services deprivation, and employment deprivation.

Option 4: 2 and 4 only - This option suggests that the HPI is based on two out of the four deprivations mentioned: literacy deprivation and employment deprivation.

The correct answer is option 2 because the HPI developed by UNDP is based only on income deprivation, literacy deprivation, and social services deprivation. Employment deprivation is not considered as part of the HPI calculation.

Alert - The correct answer should be option 2.