Step 1: Sort the instruments by family:
Indian instruments fall into four families: tata (string), sushira (wind), avanaddha (drums) and ghana (solid). Veena and Sitar are string, Flute is wind, and Tabla is a drum.
Step 2: Find the family of Urdhwak:
Urdhwak is a drum from the old Mridanga set, so it is an avanaddha instrument, which means a drum with a skin cover.
Step 3: Pick the drum among the options:
Among the four choices, only Tabla is a drum with a skin cover.
Step 4: Conclude:
The Urdhwak is related to Tabla, which is option 1. The other three are string or wind instruments, so they cannot be right.
Step 5: Recheck every option once more:
Option 1: Tabla. This is the correct choice.
Option 2: Veena. This is not the answer.
Option 3: Flute. This is not the answer.
Option 4: Sitar. This is not the answer.
Final Answer:
Tabla, option 1. \[\boxed{1}\]