Select the option that can be used as a one-word substitute for the highlighted group of words.
Rahul has done a study of statistics that contributed to the research.

Correct option is A

The correct one-word substitute for the given phrase is (a) Demography.
Demography: The study of statistics such as births, deaths, income, and population dynamics, often used in research.
Demography in Hindi: जनसांख्यिकी।
Example: The demography of the city was analyzed to understand migration patterns.
Meanings of other options:
· Choreography: The art of designing and arranging dance movements.
· Hindi: नृत्य रचना।
· Cartography: The study and practice of map-making.
· Hindi: मानचित्रण।
· Cinematography: The art of making motion pictures.
· Hindi: छायांकन।
Thus, the other options are unrelated to the context of statistics and research.