$$4\times 9=36$$.  $$\text{A}$$: $$16\times 2=32$$;  $$\text{B}$$: $$12\times 3=36$$;  $$\text{C}$$: $$7\times 5=35$$;  $$\text{D}$$: $$38\times 1=38$$. 
$$4\times 9=$$． 
1: $$16\times 2$$ 
2: $$12\times 3$$ 
3: $$7\times 5$$ 
4: $$38\times 1$$ 