若随机变量X～N(1,4),则P(1<X≤3)=( )(附:若随机变量X～N(μ,σ2)(σ>0),则P(μ-σ<X≤(μ+σ)=0.6826,P(μ-2σ<X≤μ+2σ)=0.9544.A. 0.6826B. 0.3413C. 0.9544D. 0.4772