The scholar who conceptualized the Constitution of India as a ‘seamless web’ is Granville Austin. It is important to note that this term refers to the idea that the Indian Constitution is a cohesive and interconnected document, where each part is essential and interlinked with the rest.

Option 1, MV Pylee, is not the correct answer as he is not known for conceptualizing the Constitution of India as a ‘seamless web’.

Option 2, DD Basu, is also not the correct answer as he is renowned for his book `Introduction to the Constitution of India` but not for using the term `seamless web`.

Option 4, Subhash Kashyap, is not the correct answer either as he is a constitutional expert but not associated with the concept of the Constitution as a ‘seamless web’.

Therefore, the only correct answer is option 3, Granville Austin, who introduced and popularized the notion of the Indian Constitution as a `seamless web`.