Concept:
Indian tribes are often divided into:
• Subgroups,
• Clans,
• Territorial divisions,
• Occupational sections.
Anthropologists study these internal divisions to understand:
• Social organization,
• Marriage practices,
• Cultural identity,
• Regional adaptation.
Step 1: Understanding the Tharu Tribe.
The Tharu are an important tribal community mainly found in:
• Terai region of Nepal,
• Uttar Pradesh,
• Uttarakhand.
The Tharus are traditionally divided into groups such as:
\[
\text{Uthal and Janghi}
\]
Thus:
\[
\boxed{\text{Tharus}}
\]
is the correct answer.
Step 2: Analyzing Toda Tribe.
The Toda tribe is found mainly in:
\[
\text{Nilgiri Hills of South India}
\]
They are known for:
• Pastoralism,
• Buffalo worship,
• Distinctive huts.
They are not divided into Uthal and Janghi groups.
Hence incorrect.
Step 3: Analyzing Bhotias.
Bhotias are Himalayan trading communities associated with:
• Trans-Himalayan trade,
• Sheep rearing,
• Mountain adaptation.
They do not possess Uthal and Janghi divisions.
Thus incorrect.
Step 4: Analyzing Birhors.
Birhors are a tribal hunting and gathering community mainly found in:
\[
\text{Jharkhand and nearby regions}
\]
They are not classified into Uthal and Janghi groups.
Hence incorrect.
Step 5: Final conclusion.
The groups Uthal and Janghi belong to:
\[
\boxed{\text{Tharus}}
\]
Hence, the correct answer is:
\[
\boxed{\text{(B) Tharus}}
\]