Answer:
it's 190 which mean C
Step-by-step explanation:
C = 190
Test- Ed 2020
a^9 b^6
The proportion of 16 to 4 is 4 is 1/4 of 16( 4/16 = 1/4)
So x would be 1/4 of 12
12/4 = 3
X = 3
A. Graph B
nucleotides would have 
possibilities. To exclude repetitions, we count the number of combinations: 