From left to right, which is the sequence of the
complementary strand of DNA in this molecule?

Option A) A-C-T-T-G

Explanation:

The base sequence on a strand of DNA is usually paired to specific complimentary bases. These specific pairings are as follows:

Adenine (A) pairs with Thymine (T)

Guanine (G) pairs with Cytosine (C). So when you find A replace with T, so also replace C with G and vice versa.

Thus, the complimentary sequence of the T-G-A-A-C DNA strand is A-C-T-T-G