The correct answer is “A-3 B-1 C-4 D-2”.
The correct matching is:
A. Panini - 3. Ashtadhyayi
B. Vatsyayana - 1. Kamasutra
C. Chanakya - 4. Arthashastra
D. Kalhan - 2. Rajatarangini
Kalhan authored "Rajatarangini," a historical chronicle of the kings of Kashmir.