Step 1: Understanding Kangra painting style
- Kangra painting is a form of Indian miniature painting that originated in the Kangra Valley (Himachal Pradesh) during the 18th century. It is known for its delicate and detailed style, often focusing on themes like Hindu mythology, portraits, and nature.
Step 2: Analyzing the options
- (A) Ranjeet Singh: Ranjeet Singh was the Maharaja of Punjab and is not associated with the development of Kangra painting.
- (B) Prithvi Chand: Prithvi Chand, a ruler of the region, is not the key patron of Kangra painting.
- (C) Maharaja Sansar Chand: Correct. Maharaja Sansar Chand is credited as the prime patron of the Kangra painting style. Under his patronage, the Kangra style flourished, and many masterpieces were created.
- (D) None of them: This option is incorrect, as Maharaja Sansar Chand was indeed the patron.
Step 3: Conclusion
Thus, the correct answer is (C) Maharaja Sansar Chand, as he was the prime patron of Kangra painting.
\[
\boxed{\text{Correct Answer: (C) Maharaja Sansar Chand}}
\]