To answer this question, we need to understand the relationship between C. V. Raman and Subrahmanyan Chandrasekhar.
Option A) Son - This option is incorrect because C. V. Raman and Subrahmanyan Chandrasekhar are not father and son.
Option B) Grandson - This option is incorrect because C. V. Raman and Subrahmanyan Chandrasekhar are not grandfather and grandson.
Option C) Nephew - This option is correct because Subrahmanyan Chandrasekhar is the nephew of C. V. Raman. Chandrasekhar's mother, Sitalakshmi, was the sister of Raman.
Option D) No Relation - This option is incorrect because C. V. Raman and Subrahmanyan Chandrasekhar are related as uncle and nephew.
The correct answer is C) Nephew. Subrahmanyan Chandrasekhar is the nephew of C. V. Raman.