Which one of the following statements about the grammarian Katyayana is correct ?

Katyayana was a prominent Sanskrit grammarian who lived in the period between Panini and Patanjali. He is best known for his 'Varttika', a critical commentary that supplements and refines the rules of Panini's 'Ashtadhyayi'. While Panini is generally dated to the 5th or 4th century BCE, Katyayana is placed around the 3rd century BCE. Patanjali, who wrote the 'Mahabhashya' in the 2nd century BCE, subsequently commented upon and incorporated Katyayana's Varttikas into his own work. This chronological sequence—Panini (Sutrakara), Katyayana (Varttikakara), and Patanjali (Bhashyakara)—forms the 'Munitraya' or the three sages of the Sanskrit grammatical tradition. Katyayana's role was to bridge the linguistic gap and address ambiguities that had arisen in the Sanskrit language after Panini's time but before Patanjali's synthesis.