The diagram shows a section of a DNA template strand being transcribed into a complementary mRNA strand during protein synthesis.

What is the correct base sequence of the newly synthesized mRNA strand (from left to right, matching the 5′→3′ 5' \rightarrow 3'\,5′→3′ direction shown)?
5′ - A - U - C - G - 3′5'\text{ - A - U - C - G - }3'5′ - A - U - C - G - 3′
5′ - A - T - C - G - 3′5'\text{ - A - T - C - G - }3'5′ - A - T - C - G - 3′
3′ - A - U - C - G - 5′3'\text{ - A - U - C - G - }5'3′ - A - U - C - G - 5′
5′ - U - A - C - G - 3′5'\text{ - U - A - C - G - }3'5′ - U - A - C - G - 3′