To answer this question, you need to have knowledge of Tamil literature and specifically the author of the given quote.
The quote "Mannavanum Neeyo, Valanadum Unatho? Unnai arintho thamizhai othinom?" is from the Tamil epic "Silappathikaram." The author of Silappathikaram is Ilango Adigal.
Let's go through each option to understand why it is correct or incorrect:
Option A) Ilango Adigal - This option is incorrect because Ilango Adigal is the author of Silappathikaram, not the author of the given quote.
Option B) Nakkeerar - This option is incorrect because Nakkeerar is a famous Tamil poet, but he is not the author of the given quote.
Option C) Kambar - This option is incorrect because Kambar is a renowned Tamil poet, but he is not the author of the given quote.
Option D) Auvaiyar - This option is incorrect because Auvaiyar is a well-known female poet of ancient Tamil literature, but she is not the author of the given quote.
The correct answer is A) Ilango Adigal. This option is correct because Ilango Adigal is the author of the Tamil epic Silappathikaram, which contains the given quote.