Concept:
The Soan Culture is an important prehistoric stone tool tradition associated mainly with the Soan Valley region of the Indian subcontinent.
The Soan industry is divided into:
• Early Soan,
• Late Soan.
These phases are identified on the basis of:
• Tool typology,
• Technology,
• Cultural chronology.
Step 1: Understanding Early Soan Culture.
Early Soan culture is generally associated with:
\[
\text{Lower Paleolithic}
\]
It is characterized by:
• Pebble tools,
• Choppers,
• Core tools,
• Primitive flaking techniques.
Step 2: Understanding Late Soan Culture.
Late Soan culture developed later and showed:
• More advanced flaking,
• Better tool refinement,
• Smaller and improved implements.
It is associated mainly with:
\[
\boxed{\text{Middle Paleolithic}}
\]
Thus:
\[
\text{Option (B) is correct}
\]
Step 3: Analyzing remaining options.
Option (A):
\[
\text{Lower Paleolithic}
\]
This corresponds mainly to Early Soan and not Late Soan.
Hence incorrect.
Option (C):
\[
\text{Upper Paleolithic}
\]
Upper Paleolithic is characterized by blade technology and specialized tools, which do not represent Late Soan culture.
Thus incorrect.
Option (D):
\[
\text{Mesolithic}
\]
Mesolithic culture is known for microlithic industries and is much later.
Hence incorrect.
Step 4: Final conclusion.
Therefore, Late Soan tools belong to:
\[
\boxed{\text{Middle Paleolithic Period}}
\]
Hence, the correct answer is:
\[
\boxed{\text{(B) Middle Paleolithic}}
\]