Step 1: Concept Overview:
This question assesses knowledge of key figures and schools within the medieval Indian Bhakti movement. Identify the false statement.
Step 2: Detailed Analysis:
Evaluate the accuracy of each statement:
\begin{enumerate} \item Kabir was a Nirguna Bhakti poet. Correct. Kabir was a prominent figure in the Nirguna (formless God) school of Bhakti.
\item Alwars and Nayanaars were Bhakti poets from South India. Correct. The Alwars (Vishnu devotees) and Nayanars (Shiva devotees) were Tamil poet-saints who led the Bhakti movement in South India.
\item Lal Ded was a Bhakti poet from Rajasthan. Incorrect. Lal Ded (Lalleshwari), a 14th-century mystic poet and key figure in Shaivism, was from Kashmir, not Rajasthan.
\item Shankardeva wrote his Bhakti songs, known as 'Borgeet', in the Brajaboli. Correct. Srimanta Shankardeva, a 15th-16th century saint-scholar from Assam, composed his devotional songs, the Borgeets, in the Brajaboli language.
\end{enumerate}
Step 3: Final Answer:
The incorrect statement is (C).