Final answer:
The correct complementary DNA base sequence for the original DNA sequence TGT CAC G is ACA GTG C, which pairs adenine (A) with thymine (T), and cytosine (C) with guanine (G).
Step-by-step explanation:
The complementary DNA base sequence for an original sequence of TGT CAC G is ACA GTG C. Here's how it's determined: In a complementary DNA sequence, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). Therefore, for the sequence TGT CAC G, we pair A with T, and G with C, resulting in the complementary sequence ACA GTG C. So, option (a) ACA GTG C is the correct answer.