
There are a number of acceptable answers.
For EXAMPLE, C, near-Earth transport.
The Big Bang Theory Season 2, Episode 13

For EXAMPLE,
Abu Musa Jabir ibn Hayyan...
The Big Bang Theory Season 3, Episode 7

For EXAMPLE, Jiminy.
The Big Bang Theory Season 3, Episode 2

For EXAMPLE, getting inside a cistern.
Money Heist Season 3, Episode 4

That's not true of all bars.
Juice bars for EXAMPLE.
The Big Bang Theory Season 4, Episode 5