Which of the following is the correct plot for the probability density ${\psi }^2\left(r\right)$ ${}^{}$ as a function of distance ‘r’ of the electron from the nucleus for 2s orbital?

<p>For 2S, number of radial moles = <span contenteditable="false"> <math> <mrow> <mi>n</mi> <mo>−</mo> <mi mathvariant="script">l</mi> <mo>−</mo> <mn>1</mn> <mo>=</mo> <mn>2</mn> <mo>−</mo> <mn>0</mn> <mo>−</mo> <mn>1</mn> <mo>=</mo> <mn>1</mn> </mrow> </math> </span><math><mrow></mrow></math>&nbsp;and&nbsp;<math><mrow><msup><mrow></mrow><mrow></mrow></msup><mrow><mrow></mrow></mrow></mrow></math> <span contenteditable="false"> <math> <mrow> <msup> <mrow> <mi>Ψ</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msup> <mrow> <mo> (</mo> <mrow> <mi>r</mi> </mrow> <mo>)</mo> </mrow> </mrow> </math> </span>will always be positive</p><p><math></math><span contenteditable="false"> <math> <mrow> <mo>∴</mo> <mi>o</mi> <mi>p</mi> <mi>t</mi> <mi>i</mi> <mi>o</mi> <mi>n</mi> <mrow> <mo> (</mo> <mrow> <mi>B</mi> </mrow> <mo>)</mo> </mrow> <mtext> </mtext> <mtext> </mtext> <mi>i</mi> <mi>s</mi> <mtext> </mtext> <mtext> </mtext> <mi>c</mi> <mi>o</mi> <mi>r</mi> <mi>r</mi> <mi>e</mi> <mi>c</mi> <mi>t</mi> <mtext> </mtext> <mtext> </mtext> <mo>? </mo> </mrow> </math> </span>&nbsp;it has one radial node and it is positive.</p>

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