(a) Katyayana, the author of Vartika
(b) Patanjali, the author of Mahabhashya
(c) Yajnavalkya, the author of Yajnavalkya Smriti
(d) Yaska, the author of Nirukta
Choose the correct answer from the options given below:
Correct Answer: B. (d), (a), (b), (c)