Concept:
Darjeeling Tea became the first Indian product to receive a Geographical Indication (GI) Tag. A GI tag identifies goods that originate from a specific geographical region and possess qualities or a reputation linked to that region.
Step 1: Recall the significance of Darjeeling Tea.
Darjeeling Tea is cultivated in the Darjeeling district of West Bengal and is internationally renowned for its unique flavour and aroma.
Step 2: Analyse the options.
• Mostly grown in UP and HP -- Incorrect.
• First product to be recognised as traditional knowledge -- Incorrect.
• First Indian product to get a GI tag -- Correct.
• First product to get a patent -- Incorrect.
Step 3: Final conclusion.
Hence, Darjeeling Tea is known as the
\[
\boxed{\text{First Indian product to get a GI tag}.}
\]