किसने प्रस्तावित किया था कि सभी बच्चे एक जन्मजात 'भाषा अधिग्रहण उपकरण' (Language Acquisition Device - LAD) के साथ पैदा होते हैं?

Vocabulary growth during pre-school years is largely supported by:

Arrange the following stages of language development in their correct chronological sequence: (K) Production of Sound (L) Recognition of Sound (M) Production of Words and Sentences (N) Use of Written Language (O) Final Stage of Mastery in Language Development