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<mjx-container class="MathJax CtxtMenu_Attached_0" jax="CHTML" role="presentation" tabindex="0" ctxtmenu_counter="13" style="font-size: 114.2%; position: relative;"><mjx-math class="MJX-TEX" aria-hidden="true"><mjx-mi class="mjx-i"><mjx-c class="mjx-c1D443 TEX-I"></mjx-c></mjx-mi><mjx-mi class="mjx-i"><mjx-c class="mjx-c1D44F TEX-I"></mjx-c></mjx-mi><mjx-msub><mjx-mi class="mjx-i" noic="true"><mjx-c class="mjx-c1D442 TEX-I"></mjx-c></mjx-mi><mjx-script style="vertical-align: -0.15em;"><mjx-mn class="mjx-n" size="s"><mjx-c class="mjx-c32"></mjx-c></mjx-mn></mjx-script></mjx-msub></mjx-math><mjx-assistive-mml role="presentation" unselectable="on" display="inline"><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>P</mi><mi>b</mi><msub><mi>O</mi><mn>2</mn></msub></math></mjx-assistive-mml></mjx-container> কে দ্রবীভূত করতে নিচের কোনটি ব্যবহার করা যাবে?

1. A <mjx-container class="MathJax CtxtMenu_Attached_0" jax="CHTML" role="presentation" tabindex="0" ctxtmenu_counter="14" style="font-size: 114.2%; position: relative;"><mjx-math class="MJX-TEX" aria-hidden="true"><mjx-msub><mjx-mi class="mjx-i" noic="true"><mjx-c class="mjx-c1D43B TEX-I"></mjx-c></mjx-mi><mjx-script style="vertical-align: -0.15em;"><mjx-mn class="mjx-n" size="s"><mjx-c class="mjx-c32"></mjx-c></mjx-mn></mjx-script></mjx-msub><mjx-mi class="mjx-i"><mjx-c class="mjx-c1D446 TEX-I"></mjx-c></mjx-mi><mjx-msub><mjx-mi class="mjx-i" noic="true"><mjx-c class="mjx-c1D442 TEX-I"></mjx-c></mjx-mi><mjx-script style="vertical-align: -0.15em;"><mjx-mn class="mjx-n" size="s"><mjx-c class="mjx-c34"></mjx-c></mjx-mn></mjx-script></mjx-msub></mjx-math><mjx-assistive-mml role="presentation" unselectable="on" display="inline"><math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>H</mi><mn>2</mn></msub><mi>S</mi><msub><mi>O</mi><mn>4</mn></msub></math></mjx-assistive-mml></mjx-container>
2. B <mjx-container class="M