Concept:
Sentence completion requires correct subject-verb agreement and logical meaning.
Explanation:
The subject is singular (“Seventy two year old man”), so the verb must also be singular — \textit{spends}.
The second blank logically completes the phrase “the rest,” which refers to the remaining time.
Thus, the correct sentence is:
\textit{Seventy two year old man spends half his time in India and the rest in the US.}