How many hydrogen bonds exist between this dna strand and its complementary strand? 5\'–aaactgt–3\'?

 the DNA strand given and complementary strand is as follows 
  5'–AAACTGT–3'
 3'  -TTTGACA- 5'
There are 4 types of bases, Adenine, thymine, cytosine and guanine
bases pair with the complementary base.
A pairs with T through 2 hydrogen bonds
G pairs with C through 3 hydrogen bonds 
when we draw the 2 strands vertically with the correct number of hydrogen bonds.
DNA strand | complementary strand                 A = T
                A = T
                A = T
                C ≡ G
                T = A
                G ≡ C
                 T = A
 5 A-T bonds and 2 G-C bonds
2 H bonds for A-T and 3 H bonds for G-C
Therefore total number of hydrogen bonds = (5*2) + (2*3) = 16

The answer options is d