Nearly half of India's population is still liviing in abject poverty.

Answer: Option A

Wretched : (of a person) in a very unhappy or unfortunate state.
Solid : firm and stable in shape; not liquid or fluid.
Grave : a hole dug in the ground to receive a coffin or dead body, typically marked by a stone or mound.
Enough : as much or as many as required.
Abject : (of a situation or condition) extremely unpleasant and degrading.

Synonym of Abject is Wretched